luteal phase
The second half of the menstrual cycle, occurring after ovulation when the corpus luteum produces progesterone to prepare the endometrium for implantation.
Full Definition
The luteal phase is the portion of the menstrual cycle that begins after ovulation and continues until menstruation or pregnancy establishment. During this phase, the corpus luteum formed from the ruptured follicle produces progesterone and estrogen, which prepare the endometrium for potential embryo implantation. The luteal phase typically lasts 12-14 days in most women and is crucial for maintaining early pregnancy. Luteal phase defects, characterized by inadequate progesterone production or shortened phase length, can contribute to infertility and early pregnancy loss.
Usage
Usage note: Specify whether referring to natural cycles or medicated cycles, as management differs.
In Context
- "The patient's luteal phase was supplemented with vaginal progesterone following embryo transfer." — IVF cycle management note
- "Luteal phase defects may be diagnosed through serial progesterone measurements." — Infertility workup report