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Fertilization - Definition


Fertilization is a fundamental step in sexual reproduction in which the male gamete fuses with the female gamete to form the embryo, called the zygote. In humans, the sperm plays the role of the male gamete and the egg is the female gamete. The spermatozoa contained in the semen enters the woman's vagina will come into contact with the egg, and one of them will penetrate the egg. After penetration, the oocyte will be "sealed" to the entry of other sperm, allowing the development of a single embryo. When fertilization cannot occur naturally, in vitro fertilization can be practiced, which involves the formation of an embryo outside the woman's body, which is then transferred into her uterus.