Final answer:
The correct order for the phases of the ovarian cycle is B) Follicular - ovulation - luteal. The follicular phase begins on day 1, ovulation occurs around day 14, and the luteal phase lasts from then until the end of the cycle.
Step-by-step explanation:
The correct order for the phases of the ovarian cycle, beginning with day 1, is B) Follicular - ovulation - luteal. The ovarian cycle includes three main phases:
- The follicular phase starts on day 1 and involves the maturation of follicles in the ovary. This phase generally lasts about 12 to 14 days in a 28-day menstrual cycle.
- Ovulation follows and is the process by which the egg is released from the ovary. This typically occurs around day 14 of the cycle.
- The final phase is the luteal phase, which occurs after ovulation and involves the formation of the corpus luteum from the ruptured follicle. The luteal phase usually lasts about 14 days.
During the follicular phase, estrogen levels rise, and the endometrium begins to regrow. After ovulation, the corpus luteum produces estrogen and progesterone, preparing the uterus to accept a fertilized egg and inhibiting the release of further FSH and LH.