In the 1980s and 1990s, the issue of the herpes epidemic was the prime concern of gay activist groups

The three factors that combine to allow toddlers to walk are muscle strength, brain maturation within the motor cortex, and ______

Fill in the blank with correct word

The cessation of menstruation and ovulation is called:

a) menarche. b) perimenopause. c) menopause. d) andropause.