[Study of the weight of the pregnant rat and the maternal liver: their relation to biometric parameters of the developing embryo and placenta]. / Etude pondérale de la ratte gravide et du foie maternel: ses relations avec quelques paramètres biométriques de l'embryon et du placenta en développement.

Observations carried out on a large sample of pregnant rats, their fetuses and placentas, lead to the following findings: continuous increase of liver weight along pregnancy from 2nd to 20th days, mainly within the 2nd week (organs making), to reach limit value on the 18th day. This liver weight increases roughly along with embryos and placentas weights specially from 14th to 20th days. At the 18th day the mother's liver weight depends on embryos and placentas weights. This weight of the mother's liver increased with embryos and placentas number but does not depend on resorption number. The overall mother's weight is proportional to liver weight and embryos number. All these facts underline metabolic relations between mother and fetus during pregnancy.