HSC Chapter 3

Fertilization creates a single-cell called a zygote

At birth, a female has about 2 million immature ova (eggs) in her two ovaries, each one in its own little sac (follicle).

Menstruation happens when a follicle or ovum ruptures about every 28 days until menopause.

Sperm are produced in the testicles of a mature male at a rate of hundreds of millions per day.