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A fetus or foetus (/ ˈ f iː t ə s /; pl.: fetuses, foetuses, rarely feti or foeti) is the unborn mammalian offspring that develops from an embryo. [1] Following the embryonic stage, the fetal stage of development takes place. Prenatal development is a continuum, with no clear defining feature distinguishing an embryo from a fetus.
Prenatal development (from Latin natalis 'relating to birth') involves the development of the embryo and of the fetus during a viviparous animal 's gestation. Prenatal development starts with fertilization, in the germinal stage of embryonic development, and continues in fetal development until birth. In human pregnancy, prenatal development is ...
Foeticide (British English), or feticide (North American English), is the act of killing a fetus, or causing a miscarriage. [1] Definitions differ between legal and medical applications, whereas in law, feticide frequently refers to a criminal offense, [2] in medicine the term generally refers to a part of an abortion procedure in which a provider intentionally induces fetal demise to avoid ...
Fetal viability is the ability of a human fetus to survive outside the uterus. Viability depends upon factors such as birth weight, gestational age, and the availability of advanced medical care. In low-income countries, more than 90% of extremely preterm newborns (less than 28 weeks gestational age) die due to a lack of said medical care; in ...
Stillbirth is typically defined as fetal death at or after 20 or 28 weeks of pregnancy, depending on the source. [ 1 ][ 2 ]: Overview tab,[ 8 ] It results in a baby born without signs of life. [ 9 ] A stillbirth can often result in the feeling of guilt or grief in the mother. [ 10 ] The term is in contrast to miscarriage, which is an early ...
Anatomical terminology. [ edit on Wikidata] An embryo is the initial stage of development for a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell. The resulting fusion of these two cells produces a ...
In Singapore, for example, a child is legally defined as someone under the age of 14 under the "Children and Young Persons Act" whereas the age of majority is 21. [12] [13] In U.S. Immigration Law, a child refers to anyone who is under the age of 21. [14] Some English definitions of the word child include the fetus (sometimes termed the unborn ...
Embryology (from Greek ἔμβρυον, embryon, "the unborn, embryo "; and -λογία, -logia) is the branch of animal biology that studies the prenatal development of gametes (sex cells), fertilization, and development of embryos and fetuses. Additionally, embryology encompasses the study of congenital disorders that occur before birth ...