title: Preliminary results on plasma progesterone levels during pregnancy and superfetation in the hare, Lepus Europaeus.
abstract: Peripheral plasma progesterone levels were studied in pregnant hares. A rise occurred at the beginning of pregnancy, followed by a plateau from Days 10 to 35, and then a drop during the days just before parturition. No significant differences were noted between progesterone levels in pregnancies initiated at the pre-partum oestrus and those from other oestrous periods.
mesh_terms: D000818:Animals; D003338:Corpus Luteum / Q000254:growth & development; D004967:Estrogens / Q000378:metabolism; D004971:Estrus; D005260:Female; D007793:Lagomorpha / Q000502:physiology*; D003341:Luteolysis; D008322:Mammals / Q000502:physiology*; D011247:Pregnancy; D011270:Pregnancy, Animal; D011374:Progesterone / Q000097:blood*; D012726:Sexual Behavior, Animal; D013476:Superfetation
chemical_list: D004967:Estrogens; D011374:Progesterone