The Marble Columns of the Lincoln Memorial

Studies On The Human Placenta: I. The Cell Islands In The Young Placenta

“…It is generally agreed that the fetal placenta is nourished by the maternal blood. Ample evidence supports this view: (1) In the young ovum the villi grow prior to the establishment of the fetal circulatory system, brilliantly demonstrated by Hertig (1935), (2) fetal death does not necessarily cause placental death, (3) in hydatidiform mole the placenta develops without a fetus, the vessels of the villi lack, or are underdeveloped, (4) the vessels of the fetal placenta lack vasa vasorum (B0e, 1953), (5) experimental evidence: when the fetuses are removed some time before term, the placentae continue to develop in situ until term, when they are expelled (Newton, 1938;Kirsch, 1938;and oan Wagenen and Jenkins, 1939).…”