Rats develop rapidly during infancy and become sexually mature at about 6 weeks of age.
Josiah February 21,
In the s, the institute supported itself by selling fox pelts.
The main tasks of the male reproductive system are to produce sperm cells and to introduce sperm into the female reproductive tract.
Daven Hiskey August 20, 2:
Ejaculated semen may contain as many as million sperm.
Pinworm eggs can survive for 2 to 3 weeks in bedding, clothing, carpeting, etc.