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Apr 28, 2017 · Viviparous Definition. An animal that is viviparous gives birth to developed live young. The embryos are raised with special organs in the parents as they develop, that supply nutrients to the growing embryos. This condition is known as matrotrophy, when the embryo receives nutrients directly from the mother and not from the yolk.
Jan 13, 2016 · giving birth to live young. giving birth to live offspring giving live-birth produce living young which are live-bearing. can be used interchangeably without loss of understanding. Giving birth can lead to a live birth or a stillbirth and by law both need to be registered for humans.
The term "viviparity" and its adjective form "viviparous" both derive from the Latin vivus, meaning "living"; and pario, meaning "give birth to". Reproductive mode Hemotrophic viviparity: a mammal embryo (centre) attached by its umbilical cord to a placenta (top) which provides food
Unlike oviparity, where animals lay eggs, viviparous animals give birth to live young after the embryos develop inside a womb with the help of a placenta. This article explores the definition, classification, examples, unique characteristics and behaviors, evolutionary aspects, mating and fertilization, prenatal development, labor and birth, as ...
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.
The birth of live offspring is a reproductive feature shared by mammals, some fishes, and selected invertebrates, such as scorpions, as well as various reptiles and amphibians. Animals who give birth to live offspring are called viviparous, meaning "live birth."
Most mammals are viviparous, giving birth to live young. However, the five species of monotreme, the platypuses and the echidnas , lay eggs. The monotremes have a sex determination system different from that of most other mammals. [2]
