Ovarian cycle

Definition

The ovarian cycle is the series of events in the ovaries involving the maturation of an egg, ovulation, and preparation of the uterine lining for potential pregnancy. It typically lasts around 28 days and is regulated by hormones.

5 Must Know Facts For Your Next Test

1. The ovarian cycle consists of three phases: follicular phase, ovulation, and luteal phase.
2. The follicular phase involves the growth and development of ovarian follicles under the influence of FSH (follicle-stimulating hormone).
3. Ovulation occurs mid-cycle around day 14 when a mature egg is released from the ovary.
4. The luteal phase follows ovulation, where the ruptured follicle transforms into a corpus luteum that secretes progesterone to maintain the uterine lining.
5. Hormones like estrogen and progesterone play key roles in regulating different phases of the ovarian cycle.

Review Questions

• What are the three main phases of the ovarian cycle?
• Which hormone is primarily responsible for triggering ovulation?
• What happens during the luteal phase of the ovarian cycle?

Related terms

Follicular Phase: The first phase of the ovarian cycle where follicles in the ovary mature leading up to ovulation.

Ovulation:

The release of a mature egg from an ovary, typically occurring around day 14 of a 28-day cycle.

Luteal Phase: The final phase of the ovarian cycle where the corpus luteum forms and secretes hormones to prepare for possible pregnancy.