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
Use of restraints on pregnant women should be writing these policies, the unique healthcare needs and circumstance of pregnant women and girls, the related health risks posed by restraints, and the limitation on the use of restraints to "absolute necessity". The 11 recommendations outline specific cases in which the use of restraints should be prohibited, avoided and/or limited, as well as what facility standard operating procedures should include regarding the use of restraints on pregnant women. ACOG standards specifically state that the use of restraints on pregnant incarcerated women and adolescents compromises health care and is inhumane. Georgia, South Carolina, Kentucky, Mississippi, Missouri, Nebraska, North Dakota,