[On the problem of the objective determination of humoral effects in vitro].
D066298:In Vitro Techniques; D008660:Metabolism; D010759:Phosphorus Isotopes; D010924:Placental Extracts; D011247:Pregnancy; D011270:Pregnancy, Animal; D012107:Research Design; D046509:Tissue Culture Techniques
D010759:Phosphorus Isotopes; D010924:Placental Extracts
PHOSPHORUS ISOTOPES; PLACENTAL EXTRACTS; PREGNANCY, ANIMAL; TISSUE CULTURE; TISSUE METABOLISM