How many sperm per day are commonly produced by the human male?

Recent studies indicate that PMS is due in part to

a. an estrogen/progesterone imbalance b. high levels of estrogen c. high levels of progesterone d. an interaction of ovarian hormones with serotonin

Ulrike is seeing her gynecologist because she is experiencing itching, burning, and inflammation of the labia. In addition, she has noticed a white, thick, curd-like discharge. Ulrike's symptoms are characteristic of

A) a gardnerella infection. B) a trichomonal infection. C) a candida infection. D) a gonorrheal infection.