Potassium transport in kidney and placenta in normal pregnancy and in experimental toxemia

Radioautographic Observations on Transfer of Thymidine-3H in the Trophoblastic Giant Cells in the Early Pregnancy of Rats

“…The placentas of the two groups showed identical incorporation. Zunker et al (27) using rats in conditions identical to those of the above work have studied the behaviour of 42 K from the 14th to the 20th day of pregnancy. In normal animals there was a progressive increase of 4 2 K in the foetal organism; in the toxaemic ones they have noticed a decrease in radioactivity in foetuses from the 16th day, presumably due to interference by the placental "barrier".…”