Luteal phase

After ovulation the corpus luteum produces progesterone, which makes the endometrium receptive to an embryo. The luteal phase is usually 12 to 14 days; a consistently short phase can be a sign of poor ovulation rather than a separate disease. In IVF and frozen transfer cycles this phase is supported with progesterone medication.

Also known as: second half of cycle, post-ovulation phase

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