The True Knowledge

Birth Birt h   is the act or process of bearing or bringing forth  offspring . In mammals, the process is initiated by hormones which cause the muscular walls of the  uterus  to contract, expelling the fetus at a developmental stage when it is ready to feed and breathe. In some species the offspring is  precocial  and can move around almost immediately after birth but in others it is  altricial  and completely dependent on parenting. In  marsupials , the fetus is born at a very immature stage after a short  gestational  period and develops further in its mother's wombs  pouch . It is not only humans and mammals that give birth. Some reptiles, amphibians, fish and invertebrates carry their developing young inside them. Some of these are  ovoviviparous , with the eggs being hatched inside the mother's body, and others are  viviparous , with the  embryo developing inside her body, as in mammals. IF ...

"Dead" and "Dying" redirect here. For the coloring process, see  Dyeing . For other uses, see  Dead (disambiguation)  and  Death (disambiguation) . Allegory of death: skeleton holding banderolle "Vigilate quia nescitis diem ...", anon., possibly Dutch or German. Made c.1600 Death  is the cessation of all  biological functions  that sustain a living  organism .  Phenomena which commonly bring about death  include  senescence ,  predation ,  malnutrition ,  disease ,  suicide ,  homicide ,  starvation ,  dehydration , and  accidents  or trauma resulting in terminal  injury . In most cases, bodies of living organisms begin to  decompose  shortly after death. Death – particularly the death of  humans  – has commonly been considered a  sad  or unpleasant occasion, due to the  affection  for the being that has died and the termina...