Humans reproduce sexually by the union of male and female sex cells.Reproductive system of male and female are different, they are structured to function together to achieve internal fertilization.
Spermatogenesis is the process of formation of sperm from the germ cell in the testes. Oogenesis is the formation of mature female gamete or ovum. Reproductive cycle of female primates is called menstrual cycle.
Delivery of foetus is known as parturition. It is triggers with the release of oxytocin. Production of milk from mammary gland is known as lactation.