Question

The direct trigger to ovulation seems to be a

A. Sharp increase in LH production on approximately day 13 of the menstrual cycle.
B. Sharp increase in FSH production on approximately day 13 of the menstrual cycle.
C. Sharp increase in progesterone production on approximately day 13 of the menstrual cycle.
D. Sharp increase in prolactin production on approximately day 13 of the menstrual cycle.
E. The release of gonadotrophic hormone from the follicle.

Answer 1

The correct answer is A.

Step-by-step explanation:

During the follicular phase of female cycle, estrogen produced by the dominant follicle stimulates LH secretion and LH concentration will keep raising until approximately day 13 of the cycle.

After approximately 24-36 hours from when LH reaches its peak level, ovulation occurs (it means that the dominant follicle has released an ovocyte).