In most cases, the amount of menstrual bleeding does not directly correlate with fertility. However, lighter or heavier periods may sometimes signal underlying uterine issues, such as:  

- Uterine adhesions (synechiae)—thin scar-like tissues that can stick the walls of the uterus together, potentially interfering with embryo implantation.  

- Uterine polyps—small, benign growths in the lining of the uterus that can affect implantation and increase the risk of miscarriage.  

- Uterine fibroids—non-cancerous growths in the uterus that may cause heavy or irregular bleeding and, in some cases, impact fertility.