The Gestation period in a viviparousanimal refers to the length of its pregnancy. In humans this is 266 days (38 weeks), but varies for other animals. Gestation period is measured from conception to birth. A viviparous animal is an animal employing vivipary, a method of reproduction in which the embryo develops inside the body of the mother from which it gains nourishment, and not from an egg. ... Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria Placozoa Bilateria Acoelomorpha Orthonectida Rhombozoa ?Myxozoa Superphylum Deuterostomia Chordata (vertebrates, etc. ... A pregnant woman Pregnancy is the process by which a mammalian female carries a live offspring from conception until it develops to the point where the offspring is capable of living outside the womb. ... Human beings are defined variously in biological, spiritual, and cultural terms, or in combinations thereof. ... Categories: Biology stubs ... Birth is the process in mammals by which a fetus is expelled from the body of its mother. ...
Gestation is the carrying of an embryo or fetus inside a female viviparousanimal.
In the case of multiple gestations, the organisms gestated by the mother are called twins.
The time interval of a gestation is called gestationperiod, and the length of time the offspring have spent developing in the uterus is called gestational age.
A gestationperiod of thirty-eight weeks (266 days) is calculated for women who are pregnant by a procedure such as in vitro fertilization or artificial insemination that allows them to know their exact date of conception.
The gestationperiod may also be calculated by an ultrasound examination, which is most reliable for this purpose between the eighth and eighteenth weeks of pregnancy.
Knowledge of the gestational age is important in assessing whether or not a pregnancy is progressing normally and also in evaluating the health status of a newborn.
Feeds |
Contact