Luteal phase

The luteal phase follows ovulation and lasts about 12–14 days in most cycles. The ruptured follicle becomes the corpus luteum, which produces progesterone to maintain and stabilise the uterine lining for possible implantation. If pregnancy does not occur, the corpus luteum breaks down, progesterone falls, and a period follows. A luteal phase shorter than about 10 days may be associated with reduced fertility.

Also known as: secretory phase, post-ovulation phase

Last reviewed: 9 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.