Reproduction

... historically been the responsibility of women; thus it is of particular interest in feminist economics. See also conjugation sexual intercourse father paternity mother custody self-replication reproductive technology fertility issues External link ...

Escherichia coli

... get out of the intestinal tract and into the urinary tract , they can cause an infection sometimes referred to as " honeymoon cystitis " because intercourse can lead to introduction of bacteria into the bladder. However urinary tract infection is seen in both males and females and in roughly equal ...

Human

... Birth and death The life of the individual begins at conception . An egg is usually fertilized inside the female by the male through sexual intercourse , though in vitro fertilization methods are also used. The developing individual is first called a zygote ; as it grows through successive ...

Reproduction

... historically been the responsibility of women; thus it is of particular interest in feminist economics. See also conjugation sexual intercourse father paternity mother custody self-replication reproductive technology fertility issues External link ...

Sperm

... testes in a process called spermatogenesis. Round cells called spermatogonia divide and differentiate eventually to become sperm. During sexual intercourse the sperm is deposited in the vagina - and then it moves to the ovum inside the ovary. See also sperm competition External link ...