# Lena by LenaCare > Lena is a women’s health app with clinical-grade AI that learns your cycle, symptoms and history. It answers your questions from your own history, and through Doctor Chat, a real doctor is one tap away. Lena is made by LenaCare and is available on iPhone and Android. Last updated: 6 October 2026. ## What Lena is - Lena is a women’s health app with clinical-grade AI that learns your cycle, symptoms and history. - Lena includes seven questionnaires: FertiScore (fertility), sexual health, perimenopause, breast cancer risk, work-life balance, health personality and fitness. They are built with experts, backed by research and reviewed by Lena’s medical team, led by Prof. Arash Rafii; each ends in a report with Lena’s read and what to do next. - You can ask Lena anything about your cycle, symptoms, sleep, food or mood. It answers from your own history, gives sources for medical claims and says when a doctor should weigh in. - Lena maps each cycle day to its phase (menstrual, follicular, ovulatory or luteal) and predicts your next period and ovulation. Predictions are estimates, not contraception. - A daily check-in logs how today feels: energy, sleep, stress and symptoms. - Lena writes a weekly report and a monthly cycle report, and any report can be shared as a PDF. - FertiScore turns 40+ signals into one clinical score, and a plan. It is a reference point, not a diagnosis. - The library offers workouts, recipes, articles and videos, picked for you and your phase. - Lena runs on iPhone with iOS 16.4 or later and on Android 8.0 or later, and is free to download on the App Store and Google Play. - You sign in with your Apple or Google account. - Lena speaks English, French, Arabic, Spanish and Portuguese. - Lena is for people aged 16 and over. - App Store: https://apps.apple.com/app/lena-care/id6743256203 - Google Play: https://play.google.com/store/apps/details?id=ai.lenacare.android.v2 ## Safety and limits - Lena informs and supports; it does not diagnose, prescribe or replace your doctor. - Lena is not a medical device. It is a wellness and health-information tool. - Lena’s medical team, led by Prof. Arash Rafii, a professor of obstetrics and gynecology, reviews its assessments. - Like any AI, Lena can make mistakes. That is why it shows its sources, never diagnoses, and tells you when to see a doctor. - Lena is not for emergencies. In an emergency, call your local emergency number: 112 across the EU, 15 in France. ## Who makes Lena - Lena is made by LenaCare, a French simplified joint-stock company (SAS) registered in Paris. - Registered office: 36 rue Scheffer, 75116 Paris, France. - LenaCare was founded by Julie Gauthier (CEO & co-founder), Prof. Arash Rafii (co-founder, professor of obstetrics and gynecology) and Fekry Aiad (co-founder & CTO). - Contact: contact@lenacare.ai. Privacy requests: privacy@lenacare.ai. ## Pricing - Lena is free to download and free to start, with no card needed. - Cycle tracking, check-ins, reports and the content library are free. Premium adds unlimited chat with Lena, and Doctor Chat. - New accounts get a free trial with everything unlocked. It needs no card, comes with no commitment and never turns into a paid plan by itself. - Subscriptions are paid through the App Store or Google Play, and the app shows the price before you confirm. ## Doctor Chat - Doctor Chat is a private chat with a real doctor, right inside Lena. - With your explicit consent, your doctor sees your cycle and symptoms, so you don’t start from zero. - Only you and your doctor can read the conversation. - Doctors typically reply within 15 minutes. That is typical, not guaranteed. - Lena’s AI may prepare a summary or suggest a reply, but the doctor reads, edits and decides. - Doctor Chat is included in Lena’s free trial, with no card and no commitment. After that, it comes with Premium, or with an invite code from your healthcare provider. - Doctor Chat is for everyday questions about cycles, symptoms, fertility and contraception. It is not for emergencies. ## Privacy and data - Health data hosted in the EU, under GDPR. - Your account, health data, chats and files are stored on servers in the EU. To answer you, Lena sends the relevant part of your record to an AI provider, which may process it outside the EU. - Your health data is processed on your explicit consent, which you can withdraw at any time. - Health data is encrypted in transit and at rest. - LenaCare never sells your data: not to advertisers, insurers, employers or data brokers. - Your health data is never used to train third-party AI models. LenaCare’s AI providers are contractually barred from training on your content. - A doctor sees your record only when you grant access. - Apple Health and Health Connect sync is opt-in and read-only: Lena never writes to them. - There are no ad trackers in Lena. - Deleting your account erases it within 30 days, and from backups within 90. ## For employers - LenaCare for employers is a women’s health programme for every woman on a team, not only those going through a hard time. - It covers every stage of a working life: early career; mid-career, including endometriosis and PCOS; and perimenopause and menopause, including symptomatic menopause. - It helps each woman understand where she is in her cycle and in her life, act on daily, personal guidance tuned to her phase, and connect with a real doctor, one tap away. - It goes live in four weeks with no integration: a 45-minute scoping call, a comms kit LenaCare writes and the employer approves, a launch where invite codes give the team instant access, then a first readout of activation and early usage. - For the employer, the return comes in order of leverage: health first, then productivity, then retention, and documented absence last, as the floor of the return, not the ceiling. - The employer sees no personal data: only anonymised activation and usage rates, never individual details. She shares only what she chooses to share. - The Enterprise page estimates what period pain, endometriosis and menopause already cost an organisation in documented absence, with its sources. ## Pages - [Lena by LenaCare](https://lenacare.ai/): What Lena is, the real app on a real cycle, Doctor Chat, privacy commitments and a short FAQ. - [Doctor Chat](https://lenacare.ai/doctor-chat): A private chat with a real doctor inside Lena, who typically replies within 15 minutes. What it is for, who can read it and how to get access. - [How Lena works](https://lenacare.ai/how-lena-works): What Lena’s AI knows, where its answers come from, the doctors behind it, its limits and your data controls. - [For employers](https://lenacare.ai/enterprise): A women’s health programme for every woman on the team, from early career to menopause, live in four weeks with no integration, and an estimate of what women’s health already costs in absence. - [Blog](https://lenacare.ai/blogs): Questions and answers about fertility, written with Prof. Arash Rafii and Prof. Michaël Grynberg. - [About](https://lenacare.ai/about): The story behind LenaCare and its co-founders: Julie Gauthier (CEO), Prof. Arash Rafii (professor of obstetrics and gynecology) and Fekry Aiad (CTO). - [Download the app](https://lenacare.ai/download): Links to the App Store and Google Play. - [Help center](https://lenacare.ai/help): Short answers about getting started, using Lena, Doctor Chat, subscriptions, privacy and your data. - [Contact](https://lenacare.ai/contact): Questions, partnerships, research or press: the contact form and email address. - [Privacy policy](https://lenacare.ai/privacy-policy): How Lena collects, uses and protects personal and health data, who it is shared with, how long it is kept, and your GDPR rights. - [Terms of use](https://lenacare.ai/terms-and-conditions): The rules for using Lena: what the app provides and its medical limits, subscriptions, your content, acceptable use, liability and governing law. - [Legal notice](https://lenacare.ai/legal-notice): The publisher (LenaCare SAS), the publication director and the website host. - [Full text](https://lenacare.ai/llms-full.txt): this summary, plus every help center answer, the FAQs, the employer programme and every blog article in full. - [This summary in French](https://lenacare.ai/fr/llms.txt) ## Blog articles - [PCOS: everything you need to know, simply explained](https://lenacare.ai/blogs/sopk-everything-you-need-to-know-simply-explained): Polycystic ovary syndrome (PCOS) affects about 1 in 10 women. It’s not a serious illness, and with good management, you can live very well with it! - [How are embryos selected?](https://lenacare.ai/blogs/how-are-embryos-selected): Embryologists grade embryos on cell number, stage and blastocyst structure to pick the best for transfer, but grading never guarantees a pregnancy. - [How does embryo transfer work?](https://lenacare.ai/blogs/how-does-embryo-transfer-work): Embryo transfer is a critical step in IVF success, requiring close coordination between the fertility specialist and the embryologist. - [How is the number of embryos for transfer decided?](https://lenacare.ai/blogs/how-is-the-number-of-embryos-for-transfer-decided): Before starting IVF, a detailed discussion takes place between the couple, fertility specialist, and embryologist to decide how many embryos to transfer. - [Is pregnancy after assisted reproduction considered high-risk?](https://lenacare.ai/blogs/is-pregnancy-after-assisted-reproduction-considered-high-risk): Not usually. Pregnancies after IVF, ICSI or IVM follow standard prenatal care, with no extra monitoring unless specific risk factors are present. - [Under what conditions are embryos frozen?](https://lenacare.ai/blogs/under-what-conditions-are-embryos-frozen): Embryo freezing (cryopreservation) is a technique that preserves embryos in liquid nitrogen at -196°C. - [What is in vitro maturation (IVM)?](https://lenacare.ai/blogs/who-is-in-vitro-maturation-(ivm)-recommended-for): In IVM, immature eggs are collected from antral follicles and matured in the lab, not in the ovaries. It suits women at high risk of OHSS, among others. - [What is preimplantation genetic diagnosis (PGD)?](https://lenacare.ai/blogs/what-is-preimplantation-genetic-diagnosis-(pgd)): PGD tests IVF embryos for a known genetic or chromosomal disorder before transfer, so couples at risk can avoid passing it on to their child. - [When does embryo transfer take place?](https://lenacare.ai/blogs/when-does-embryo-transfer-take-place): Embryo transfer happens between Day 2 and Day 5 after egg retrieval. The day depends on how many embryos there are and on the lab’s strategy. - [When is egg donation recommended?](https://lenacare.ai/blogs/when-is-egg-donation-recommended): Egg donation is considered when a woman can no longer produce eggs of sufficient quantity and/or quality for conventional assisted reproduction. - [Are some gonadotropin treatments more effective than others?](https://lenacare.ai/blogs/are-some-gonadotropin-treatments-more-effective-than-others): No gonadotropin preparation has been proven more effective than another. LH is essential only in hypogonadotropic hypogonadism, where ovulation needs it. - [Are there higher risks of early miscarriage or pregnancy complications?](https://lenacare.ai/blogs/are-there-higher-risks-of-early-miscarriage-or-pregnancy-complications): Yes. PCOS raises the risk of early miscarriage, especially with obesity, and of gestational diabetes and high blood pressure. Closer monitoring helps. - [Are there treatments for ovulation disorders in women with PCOS?](https://lenacare.ai/blogs/are-there-treatments-for-ovulation-disorders-in-women-with-pcos): Weight loss can restore ovulation in some women with PCOS. If not, clomiphene citrate comes first, then ovarian drilling or ovarian stimulation. - [Can a normal pregnancy still happen after three consecutive miscarriages?](https://lenacare.ai/blogs/can-a-normal-pregnancy-still-happen-after-three-consecutive-miscarriages): Yes, despite experiencing three consecutive miscarriages, many women still have a good chance of carrying a pregnancy to term. - [Can a sexually transmitted infection affect fertility?](https://lenacare.ai/blogs/can-a-sexually-transmitted-infection-affect-fertility): Yes. Often silent, STIs like chlamydia and gonorrhea can scar and block the Fallopian tubes. Antibiotics clear them but can’t always undo the damage. - [Can in vitro fertilization fail?](https://lenacare.ai/blogs/can-in-vitro-fertilization-fail): Yes, fertilization failure or abnormalities can occur. Complete fertilization failure happens in about 5% of IVF cases, meaning no embryos are formed. - [Can ovarian aging be reversed?](https://lenacare.ai/blogs/can-ovarian-aging-be-reversed): Not yet. Mitochondrial transfer, PRP injections and follicular activation are being studied, but all remain experimental, with uncertain results. - [Can the amount of hormones administered affect egg quality?](https://lenacare.ai/blogs/can-the-amount-of-hormones-administered-affect-egg-quality): No, the intensity of ovarian stimulation and the number of eggs retrieved do not increase the risk of genetic abnormalities in embryos created through IVF. - [Can we reverse the impact of age on fertility?](https://lenacare.ai/blogs/can-we-reverse-the-impact-of-age-on-fertility): The biological mechanisms behind age-related infertility are well understood, but current medical treatments cannot fully reverse ovarian aging. - [Do all women respond the same way to ovarian stimulation?](https://lenacare.ai/blogs/do-all-women-respond-the-same-way-to-ovarian-stimulation): No. AMH and antral follicle count guide the FSH dose, yet some women over- or under-respond. Treatment is adjusted for each group. - [Does age affect IVF success rates?](https://lenacare.ai/blogs/does-age-affect-ivf-success-rates): A man’s age has a minor effect on IVF success. A woman’s age matters far more: older eggs carry more chromosomal errors, lowering the chances. - [Does taking the pill reduce fertility?](https://lenacare.ai/blogs/does-taking-the-pill-reduce-fertility): No, taking the pill—regardless of the type—does not accelerate ovarian aging or reduce fertility. - [How are eggs retrieved?](https://lenacare.ai/blogs/how-are-eggs-retrieved): Eggs are collected by transvaginal aspiration under ultrasound, with local anesthesia or light sedation. A thin needle drains the follicles. - [How can uterine fibroids affect fertility?](https://lenacare.ai/blogs/how-can-uterine-fibroids-affect-fertility): Fibroids are rarely the sole cause of infertility, but their size and location can impact reproductive outcomes. - [How does a woman’s age affect fertility?](https://lenacare.ai/blogs/how-does-a-woman-s-age-affect-fertility): Fertility peaks between 20 and 30, then declines, faster after 35–37, as eggs drop in number and quality. AMH and follicle counts estimate the reserve. - [How does Fallopian tube blockage affect fertility?](https://lenacare.ai/blogs/how-does-fallopian-tube-blockage-affect-fertility): Natural conception needs at least one open tube. Blockages near the uterus or near the ovaries are treated differently, and hydrosalpinx can hinder IVF. - [How does ovarian stimulation work?](https://lenacare.ai/blogs/how-does-ovarian-stimulation-work): Ovarian stimulation involves daily injections of FSH (follicle-stimulating hormone), starting at the beginning of a menstrual cycle. - [How is endometriosis managed?](https://lenacare.ai/blogs/how-is-endometriosis-managed): The main goals of endometriosis treatment are to reduce symptoms, slow the progression of lesions, and support fertility in women who wish to conceive. - [How is ovulation disorder diagnosed in hypogonadotropic hypogonadism?](https://lenacare.ai/blogs/how-is-ovulation-disorder-diagnosed-in-hypogonadotropic-hypogonadism): When the pituitary makes too little FSH and LH, ovulation stops though the ovaries are healthy. Absent periods and hormone tests point to it. - [Is PCOS linked to overweight and obesity?](https://lenacare.ai/blogs/is-pcos-linked-to-overweight-and-obesity): Yes: about half of women with PCOS are overweight or obese. Excess weight worsens ovulation problems, but losing weight can help restore ovulation. - [Should endometriosis surgery always be performed?](https://lenacare.ai/blogs/should-endometriosis-surgery-always-perfromed): Not always. Ovarian surgery can lower ovarian reserve, cysts under 6 cm rarely need it, and IVF often comes first for endometriosis-related infertility. - [What are gonadotropin treatments?](https://lenacare.ai/blogs/what-are-gonadotropin-treatments): Gonadotropins are injectable FSH and/or LH. They induce ovulation in PCOS or hypogonadotropic hypogonadism and stimulate the ovaries for IUI and IVF. - [What are the causes of recurrent miscarriages?](https://lenacare.ai/blogs/what-are-the-causes-of-recurrent-miscarriages): Recurrent miscarriages can result from genetic, hormonal, anatomical, environmental, or immunological factors. - [What are the possible complications of IVF?](https://lenacare.ai/blogs/what-are-the-possible-complications-of-ivf): Complications from IVF are rare, but couples should be informed of potential risks associated with ovarian stimulation and egg retrieval. - [What are the symptoms of endometriosis?](https://lenacare.ai/blogs/what-are-the-symptoms-of-endometriosis): Pelvic pain, lower back pain, digestive issues and pain during sex, often worse around periods. Many women with endometriosis have no symptoms. - [What happens to the retrieved eggs in the laboratory?](https://lenacare.ai/blogs/what-happens-with-the-retrieved-eggs-in-the-laboratory): In the lab, retrieved eggs are placed in culture with prepared, motile sperm. About 18 to 20 hours later, embryologists check for fertilization. - [What is assisted oocyte activation (AOA)?](https://lenacare.ai/blogs/what-is-assisted-oocyte-activation-(aoa)): Assisted oocyte activation (AOA) chemically triggers an egg that sperm fail to activate after ICSI. Still experimental, it’s prohibited in France. - [What is endometriosis?](https://lenacare.ai/blogs/what-is-endometriosis): Endometriosis is a condition where tissue similar to the lining of the uterus (endometrial glands) grows outside the uterus, triggering inflammation. - [What is ICSI?](https://lenacare.ai/blogs/what-is-icsi): Intracytoplasmic Sperm Injection (ICSI), developed in 1991, is an advanced fertilization technique used in assisted reproduction. - [What is IMSI?](https://lenacare.ai/blogs/what-is-imsi): IMSI is ICSI with sperm chosen under ultra-high magnification (6,000x to 10,000x). Its benefits are debated, so it isn’t recommended for everyone. - [What is in vitro fertilization (IVF)?](https://lenacare.ai/blogs/what-is-in-vitro-fertilization-(ivf)): In vitro fertilization (IVF) is a form of assisted reproductive technology (ART) developed in the late 1970s and early 1980s. - [What is intrauterine insemination (IUI)?](https://lenacare.ai/blogs/what-is-intrauterine-insemination-(iui)): IUI places lab-prepared sperm directly in the uterus around ovulation. Who it suits, what tests come first, how it’s done, and its 10–20% success rate. - [What is polycystic ovary syndrome (PCOS)?](https://lenacare.ai/blogs/what-is-polycystic-ovary-syndrome-(pcos)): PCOS causes 10% of female infertility. Despite the name, there are no real cysts: it’s an excess of follicles, with irregular cycles and excess androgens. - [What is premature ovarian insufficiency?](https://lenacare.ai/blogs/what-is-premature-ovarian-insufficiency): Premature ovarian insufficiency (POI) means no periods for over six months before 40. Its causes, its symptoms and the rare chances of pregnancy. - [What is the difference between inducing and stimulating ovulation?](https://lenacare.ai/blogs/what-is-the-difference-between-inducing-and-stimulating-ovulation): Induction restores ovulation, aiming for one follicle, in women who don’t ovulate. Stimulation matures several follicles in women who do, mainly for IVF. - [What is the link between ovarian reserve and ovarian insufficiency?](https://lenacare.ai/blogs/what-is-the-link-between-ovarian-reserve-and-ovarian-insufficiency): Ovarian reserve naturally declines with age, but low ovarian reserve does not always mean ovarian insufficiency. - [What tests are required before IVF?](https://lenacare.ai/blogs/what-tests-are-required-before-ivf): Before IVF, women usually have an ovarian reserve assessment, a check of the fallopian tubes and an evaluation of the uterine cavity, and men a semen analysis. - [When are recurrent miscarriages diagnosed?](https://lenacare.ai/blogs/when-are-recurrent-miscarriages-diagnosed): Recurrent miscarriage means three consecutive miscarriages before 20 weeks, each confirmed by ultrasound. It affects about 1% of women. - [Who is IVF recommended for?](https://lenacare.ai/blogs/who-is-ivf-recommended-for): IVF is primarily offered to couples or individuals facing medical conditions that prevent natural conception. - [Why is ovarian stimulation necessary for assisted reproductive technology (ART)?](https://lenacare.ai/blogs/why-is-ovarian-stimulation-necessary-for-assisted-reproductive-technology-(art)): A natural cycle yields one egg. Stimulation matures several: mildly for IUI, to avoid multiples, and more for IVF, where extra embryos can be frozen. - [Why is ovulation blocked?](https://lenacare.ai/blogs/why-is-ovulation-blocked): Under normal physiological conditions, ovulation occurs when a pre-ovulatory follicle reaches a size of 16 to 22 mm in diameter. - [Are hormone tests reliable?](https://lenacare.ai/blogs/are-hormone-tests-reliable): AMH has largely replaced FSH as the marker of ovarian reserve. Still, a high FSH early in the cycle points to a poorer prognosis in assisted reproduction. - [Are some sexual positions better for conception?](https://lenacare.ai/blogs/are-some-sexual-positions-better-for-conception): No position boosts the chances of conception. What counts is ejaculation inside the vagina and timing sex around ovulation, not a handstand afterwards. - [Can a man and a woman be biologically incompatible for conception?](https://lenacare.ai/blogs/can-a-man-and-a-woman-be-biologically-incompatible-for-conception): No, there is no scientifically proven incompatibility that would prevent a specific man and woman from conceiving together. - [Can a woman ovulate more than one egg in the same cycle?](https://lenacare.ai/blogs/can-a-woman-ovulate-more-than-one-egg-in-the-same-cycle): Yes. In some cycles, a woman may release two eggs instead of one, meaning that two follicles reach maturity and ovulate. - [Can I track my ovulation by measuring my temperature?](https://lenacare.ai/blogs/can-i-track-my-ovulation-by-measuring-my-temperature): Tracking your basal body temperature (BBT) to determine ovulation is an old method based on a slight rise in body temperature after ovulation. - [Can the quality of ovulation be predicted?](https://lenacare.ai/blogs/can-the-quality-of-ovulation-be-predicted): Currently, there is no method to accurately determine the quality of a woman’s ovulation. - [Do early or late first periods predict menopause timing?](https://lenacare.ai/blogs/do-early-or-late-first-periods-predict-menopause-timing): No. The age at which a woman gets her first period does not determine when she will reach menopause. - [Do I always ovulate from the same ovary?](https://lenacare.ai/blogs/do-i-always-ovulate-from-the-same-ovary): No. Ovulation typically alternates between the two ovaries each month. However, this process is not strictly predictable, and some variations can occur. - [Do I always ovulate in the middle of my cycle?](https://lenacare.ai/blogs/do-i-always-ovulate-in-the-middle-of-my-cycle): No. The timing of ovulation can vary from one woman to another and even within the same woman over time. - [Do tight underwear reduce male fertility?](https://lenacare.ai/blogs/do-tight-underwear-reduce-male-fertility): While tight underwear may slightly increase testicular temperature, current research does not strongly link them to infertility. - [Do vacations increase the chances of conceiving?](https://lenacare.ai/blogs/do-vacations-increase-the-chances-of-conceiving): No “vacation effect” boosts fertility. More frequent sex on holiday does raise the odds, but timing intercourse around ovulation is what counts. - [Do vitamins improve sperm and egg quality?](https://lenacare.ai/blogs/do-vitamins-improve-sperm-and-egg-quality): So far, no vitamin supplementation has been proven to significantly enhance male or female fertility. - [Does frequent ejaculation affect sperm production?](https://lenacare.ai/blogs/does-frequent-ejaculation-affect-sperm-production): No. Sperm production is continuous, however often you ejaculate. Frequent ejaculation may slightly lower the volume and sperm count, not the quality. - [Does male or female masturbation reduce the chances of conception?](https://lenacare.ai/blogs/does-male-or-female-masturbation-reduce-the-chances-of-conception): No, as long as regular sexual intercourse is maintained, masturbation does not negatively impact fertility. - [Does the flow of menstrual bleeding affect fertility?](https://lenacare.ai/blogs/does-the-flow-of-menstrual-bleeding-affect-fertility): In most cases, the amount of menstrual bleeding does not directly correlate with fertility. - [How are eggs produced?](https://lenacare.ai/blogs/how-are-eggs-produced): Each egg cell (oocyte) is contained within a small structure called a follicle, with each follicle holding just one oocyte. - [How are the Fallopian tubes evaluated?](https://lenacare.ai/blogs/how-are-the-fallopian-tubes-evaluated): The gold standard test for assessing Fallopian tube function is the hysterosalpingography (HSG). - [How are the testicles structured?](https://lenacare.ai/blogs/how-are-the-testicles-structured): The testicles contain a specialized tissue called testicular parenchyma, made up of several meters of seminiferous tubules where sperm cells are produced. - [How do sperm travel through the male reproductive system?](https://lenacare.ai/blogs/how-do-sperm-travel-through-the-male-reproductive-system): Sperm travel through a network of ducts that stores them until ejaculation, maturing on the way. Accessory glands make most of the semen. - [How do the ovaries work?](https://lenacare.ai/blogs/how-do-the-ovaries-work): The ovaries make female hormones, mainly estrogen, and release an egg each month from puberty to menopause. Estrogen also supports bones and the heart. - [How does an embryo develop?](https://lenacare.ai/blogs/how-does-an-embryo-develop): A fertilized egg is called a zygote, the first stage of embryonic development, formed after the fusion of the sperm and egg. - [How does an ovulation test work?](https://lenacare.ai/blogs/how-does-an-ovulation-test-work): An ovulation test detects the LH surge in urine, about 36 hours before ovulation. Fairly reliable for timing sex, it says nothing about egg quality. - [How does embryo implantation happen?](https://lenacare.ai/blogs/how-does-embryo-implantation-happen): Implantation needs a genetically healthy embryo and a receptive uterine lining. If either is missing, it can fail or end in an early miscarriage. - [How does fertilization occur?](https://lenacare.ai/blogs/how-does-fertilization-occur): Each month, a mature egg is released. Fertilization happens when it meets a sperm cell: the two fuse, and their chromosomes combine into a zygote. - [How is the uterus examined?](https://lenacare.ai/blogs/how-is-the-uterus-examined): A pelvic ultrasound early in the cycle checks the uterus for fibroids and malformations. Hysterosonography or hysteroscopy look inside the cavity. - [Infertility: when should you see a doctor and what to check?](https://lenacare.ai/blogs/infertility-when-should-you-see-a-doctor-and-what-to-check): If you have been trying to conceive for one year without success, it is time to see a specialist. - [Is infertility just “in the mind”?](https://lenacare.ai/blogs/is-infertility-just-in-the-mind): Rarely. Stress affects health, but most infertility has a biological cause. And telling couples to “just relax” doesn’t help; medical support does. - [Is it a problem if semen leaks out of the vagina after sex?](https://lenacare.ai/blogs/is-it-a-problem-if-semen-leaks-out-of-the-vagina-after-sex): No. Sperm quickly travel up through the cervix and uterus to the Fallopian tubes. The semen that leaks out is normal and doesn’t lower your chances. - [Ovarian function evaluation: assessing ovarian reserve](https://lenacare.ai/blogs/ovarian-function-evaluation-assessing-ovarian-reserve): Blood tests early in the cycle (FSH, LH, estradiol, progesterone, AMH) and an ultrasound follicle count show whether ovarian stimulation is feasible. - [Should sexual intercourse be frequent?](https://lenacare.ai/blogs/should-sexual-intercourse-be-frequent): Yes! While there is an optimal fertility window around ovulation, ovulation timing is not always predictable. - [What does the menstrual cycle reveal about fertility?](https://lenacare.ai/blogs/what-does-the-menstrual-cycle-reveal-about-fertility): The length and regularity of menstrual cycles can provide some insight into ovarian function and fertility. - [What happens to sperm after ejaculation in the female reproductive tract?](https://lenacare.ai/blogs/what-happens-to-sperm-after-ejaculation-in-the-female-reproductive-tract): Sperm head through the vagina, cervix and uterus to the Fallopian tubes. Most never get there, and usually only one fertilizes the egg. - [What is a menstrual period?](https://lenacare.ai/blogs/what-is-a-menstrual-period): A period reflects the ovaries’ estrogen and progesterone and how the uterus responds. With no implantation, the top layer of the lining sheds. - [What is spermatogenesis?](https://lenacare.ai/blogs/what-is-spermatogenesis): Spermatogenesis is the process through which sperm stem cells (spermatogonia) develop into mature sperm cells capable of fertilizing an egg. - [What is the role of the Fallopian tubes?](https://lenacare.ai/blogs/what-is-the-role-of-the-fallopian-tubes): The Fallopian tubes catch the egg after ovulation, host fertilization and carry the embryo to the uterus. One healthy tube is often enough. - [What is the role of the uterus?](https://lenacare.ai/blogs/what-is-the-role-of-the-uterus): The uterus is the organ where the embryo implants and develops during pregnancy. - [When should you suspect an ovulation disorder? What are the causes?](https://lenacare.ai/blogs/when-should-you-suspect-an-ovulation-disorder-what-are-the-causes): No periods, or cycles under 24 or over 45 days, suggest an ovulation disorder. Causes include PCOS, hypogonadism, POI and some medications. - [Why is testosterone important for sperm production… and more?](https://lenacare.ai/blogs/why-is-testosterone-important-for-sperm-production-and-more): Testosterone starts and sustains sperm production. It also drives muscle and libido, and declines with age, along with sperm quality.