Birth

Birth is the act or process of bearing or bringing forth offspring, also referred to in technical contexts as parturition. 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 gestation and develops further in its mother's womb pouch. It is not only 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 the case of mammals.

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A Better Birth Is Possible

Maternal education and household income at birth can increase a child's chances of overweight and obesity at age 10, according to new research

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Nano-preterm infants may not benefit from noninvasive versus invasive ventilation at birth, study finds

Study Reveals The Wonderfully Unique Way Seahorse Dads Give Birth

ALMA discovers birth cry from a baby star in the Small Magellanic Cloud

ALMA discovers birth cry from a baby star in the Small Magellanic Cloud

JWST reveals young star that may be about to give birth to a planet

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Preterm birth's link with educational attainment explored in U.K. primary and secondary schoolchildren

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Scientists find the secret to birth of earliest black holes in the Cosmos. New work by an international team of cosmologists suggests an answer: flows of cold matter, shaped by mysterious dark matter, force-feeding black holes born from the deaths of gigantic primordial stars.

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