What is the difference between the follicular phase and the luteal phase?

• A. The follicular phase involves the growth of follicles, while the luteal phase occurs after ovulation and prepares the uterus for potential implantation.
• B. The luteal phase involves growth of follicles
• C. They are identical
• D. The luteal phase occurs before ovulation

Answer: (A)

The difference lies in timing and what each phase does for the ovary and uterus. In the follicular phase, follicles grow in the ovaries and estrogen rises, helping to prepare the reproductive tract for potential ovulation. After ovulation, the luteal phase begins: the remaining follicle forms the corpus luteum and secretes progesterone (with some estrogen) to further prepare and maintain the endometrium for possible implantation. If pregnancy doesn’t occur, hormone levels fall and menses starts. So the statement that the follicular phase involves follicle growth, and the luteal phase occurs after ovulation to prepare the uterus for potential implantation, accurately describes the distinct roles and timing. The other options misplace where follicle growth happens, claim they’re identical, or suggest the luteal phase occurs before ovulation.