Can high prolactin be linked to repeated pregnancy loss or PMOS?

When a woman has difficulty conceiving or experiences repeated pregnancy loss, the focus often turns to the uterus, the quality of the embryos or ovarian reserve . However, hormones, too, can play an important role, and one hormone that deserves attention is prolactin.

Prolactin is produced by the pituitary gland and is best known for its role in breast milk production. Its levels naturally rise during pregnancy and breastfeeding. Outside these periods, however, persistently elevated prolactin, a condition known as hyperprolactinaemia, can interfere with normal reproductive function.

The symptoms are not always obvious. Some women may have irregular or absent periods, difficulty conceiving or an unexpected milky discharge from the breasts. Others may have no noticeable symptoms at all.

Reproductive hormones work as a closely connected system. Prolactin is part of this system, and when its levels remain elevated, it can interfere with the hormonal signals required for ovulation.