Umbilical cord from and contains remnants of the yolk sac and allantois. It forms by the fifth week of development, replacing the yolk sac as the source of nutrients for the embryo. The cord is not directly connected to the mother's circulatory system, but instead joins the placenta, which transfers materials to and from the maternal blood without allowing direct mixing. The length of the umbilical cord is approximately equal to the crown-rump length of the fetus throughout pregnancy. The umbilical cord in a full term neonate is usually about 50 centimeters (20 in) long and about 2 centimeters (0.75 in) in
Murder of pregnant women Murder of pregnant women Murder of pregnant women is a type of homicide often resulting from domestic violence. Domestic violence—or intimate partner violence (IPV)—is suffered by many, and when analyzing cases in which victims came forward, majority of them are women. Many of these women fear harm not just to themselves but also to their unborn children. Recently, more focus has been placed on pregnancy-associated deaths due to violence. IPV may begin when the victim becomes pregnant. Research has shown that abuse while pregnant is a red flag for pregnancy-associated homicide. The murder of pregnant women represents a relatively recently