non-placental

However, there are studies suggesting that at least some of the African HIV transmission due to non-placental, non-sexual causes is due to illegal abortion, and that this may be more important than ritual circumcision/female genital mutilation, also a known factor in transmission.

(Very) Basic Economics and Abortion 2006

However, there are studies suggesting that at least some of the African HIV transmission due to non-placental, non-sexual causes is due to illegal abortion, and that this may be more important than ritual circumcision/female genital mutilation, also a known factor in transmission.

(Very) Basic Economics and Abortion 2006

Subsequently, as the non-placental chorionic villi atrophy, their vessels disappear; and then the umbilical arteries convey the whole of their contents to the placenta, whence it is returned to the heart by the umbilical veins.

V. Angiology. 3. Development of the Vascular System 1918

Among the former, the amphibian follows the fish, the reptile follows the amphibian, the mammal follows the reptile, and non-placental mammals are followed by the placental.

Time and Change John Burroughs 1879

The non-placental mammals may have a different calculus for parental investment, and there are important mechanistic differences as well.

ScienceBlogs Channel : Life Science 2009

The multiplicity or loss of the vitellogenin (vtg) gene family in vertebrates has been argued to have broad implications for the mode of reproduction (placental or non-placental), cleavage pattern (meroblastic or holoblastic) and character of the egg (pelagic or benthic).

BioMed Central - Latest articles 2009

The greater part of the chorion is in contact with the decidua capsularis (Fig. 34), and over this portion the villi, with their contained vessels, undergo atrophy, so that by the fourth month scarcely a trace of them is left, and hence this part of the chorion becomes smooth, and is named the chorion læve; as it takes no share in the formation of the placenta, it is also named the non-placental part of the chorion.

I. Embryology. 11. Development of the Fetal Membranes and Placenta 1918