Pregnancy and Birth - Key terms



EMBRYO:

The stage of animal development in the uterus before the point at which the animal is considered a fetus. In humans this is equivalent to the first three months.

FALLOPIAN TUBES:

A set of trumpet-like tubes that carries a fertilized egg from the ovary to the uterus.

FERTILIZATION:

The process of cellular fusion that takes place in sexual reproduction. The nucleus of a male reproductive cell, or gamete, fuses with the nucleus of a female gamete to produce a zygote.

FETUS:

An unborn or unhatched vertebrate that has taken on the shape typical of its kind. An unborn human usually is called a fetus during the period from three months after fertilization to the time of birth.

GESTATION:

The time between fertilization and birth, during which the unborn offspring develops in the uterus.

HORMONE:

Molecules produced by living cells, which send signals to spots remote from their point of origin and induce specific effects on the activities of other cells.

OVARY:

Female reproductive organ that contains the eggs.

OVIPAROUS:

A term for an animal that gives birth to eggs that must develop before hatching. Compare with viviparous.

OVOVIVIPAROUS:

A term for an animal that produces eggs but retains them inside the body until hatching occurs, so that "live" offspring are born. Compare with oviparous and viviparous.

OVUM:

An egg cell.

UTERUS:

A reproductive organ, found in most female mammals, in which an embryo and, later, a fetus grows and develops.

VAGINA:

A passage from the uterus to the outside of the body.

VIVIPAROUS:

A term for an animal that gives birth to live offspring. Compare with oviparous.

Also read article about Pregnancy and Birth from Wikipedia

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