What is the function of LH (luteinizing hormone) in the menstrual cycle?

A. Development of follicles in the ovary
B. Repair of the uterus lining following menstruation
C. Stimulation of ovulation
D. Preparation of the uterus for implantation

C

The correct answer in Question 25 was contested by some teachers who thought that LH both stimulates follicle development of follicles and ovulation. This view is not supported by the evidence, which shows that LH promotes secretion of estrogen by cells in the developing follicle but that follicle development is stimulated by FSH. The two pituitary hormones FSH and LH have distinctly different roles and it is not correct to lump them together in an explanation of the menstrual cycle. The LH surge is such a good predictor of ovulation for couples wanting to conceive because LH stimulates ovulation.