A fetus (/ˈfiːtəs/; also spelled foetus, fœtus, faetus, or fætus, see below) is a developing mammal or other viviparous vertebrate after the embryonic stage and before birth.

In humans, the fetal stage of prenatal development starts at the beginning of the 11th week in gestational age, which is the 9th week after fertilization. This article will discuss the etymology of the fetus and its development from weeks 9 to 38. The viability and fetal pain is also a concern. Circulatory system involving postnatal development and the differences from the adult circulatory system will be discussed along with the immune system. Developmental problems and legal issues are up for discussion as well.

Read more about FetusEtymology, Viability, Fetal Pain, Circulatory System, Immune System, Developmental Problems, Legal Issues

Other articles related to "fetus":

Shoulder Presentation - Frequency and Causes
... either the head or the buttocks start to enter the upper part of the pelvis anchoring the fetus in a longitudinal lie ... multiple gestation, placenta previa, a small fetus, or a fetus with some abnormality ...
Colautti V. Franklin
... or professional competence that the fetus is not viable, and if the determination is that the fetus is viable or if there is sufficient reason to believe that the fetus may be viable, shall exercise that ... prosecution "as would pertain to him had the fetus been a child who was intended to be born and not aborted." Franklin and others sued, arguing that the provision was both vague and overbroad ... the fetus is viable or if there is sufficient reason to believe the fetus may be viable" was insufficient and impermissibly vague guidance for physicians who might face criminal liability if a jury disagrees with ...
Begat - Process - Pregnancy
... Pregnancy is the period of time during which the fetus develops, dividing via mitosis inside the female ... During this time, the fetus receives all of its nutrition and oxygenated blood from the female, filtered through the placenta, which is attached to the fetus' abdomen via an umbilical cord ...
... The acephalic fetus is a parasitic twin attached to an otherwise intact fetus ... The acephalic fetus has a body but lacks a head and heart the fetus's neck is attached to the normal twin ... The blood circulation of the acephalic fetus is provided by the heart of the twin ...
Childbirth And Obstetrics In Antiquity - Gynecology and Pregnancy
... Women On the Nature of Women Superfetation (the conception of a second fetus while already pregnant) Excision of the Fetus (on complications during delivery) On the Diseases of Young ...

Famous quotes containing the word fetus:

    We really need to get over this love affair with the fetus and start worrying about children.
    Joycelyn Elders (b. 1933)