Gestation

Gestation is the carrying of an embryo or fetus inside a female viviparous animal. In mammals that undergo a pregnancy, they can have one or more gestations at the same time, resulting in multiple gestations. In the case of multiple gestations, the organisms gestated by the mother are called twins.

For example, female dogs usually have multiple ovulations in a single estrus cycle, and, when the ova get fertilized, the animal gestates multiple offspring in one single pregnancy.

The time interval of a gestation is called gestation period, and the length of time the offspring have spent developing in the uterus is called gestational age.

In humans, parturition normally occurs at a gestational age of 37 to 42 weeks. Childbirth occurring before 37 weeks of gestation is considered preterm and has been associated with 70% of neonatal mortality and 75% of morbidity. A preterm fetus is considered viable only if it is delivered after the 28th week of gestation; before this age, those major developmental events that would allow the fetus to survive outside the womb have not occurred. to reproduce males must stick their penis into the females vigina