What is the primary function of Leydig cells?

Erection occurs after activation of which of the following?

Testosterone is produced :

Human spermatozoa :

Infertility in the male can be explained by observations that in all following except :

Approximately how long does it take for a spermatocyte to complete its differentiation into a spermatozoan in the testis?

During the secretory phase of menstrual cycle, elevated progesterone levels result in :

The source of increase in estrogen concentration in plasma before ovulation :

Which hormone causes FSH and LH to be released?

In a normal 28 day menstrual cycle when would you expect ovulation to take place?

After 7 days of ovulation, pituitary secretion of LH decreases rapidly. What is the cause of this decrease in secretion?

A 25 years old woman comes to clinic for routine examination.Based on her history of regular menstruation, it is most likely that she is in late proliferative phase of her menstrual cycle. If so, the doctor would expect her to have which of the following?

The secretory phase in the human menstrual cycle is also called:

Which of the following hormones typically and significantly increases in the follicular phase of the menstrual cycle?

A 34-year-old woman presents with amenorrhea and hyperprolactinemia in the treatment of hyperprolactinemia, bromocriptine act as :