title: Chorionic surface area in conceptuses from sows treated with progesterone and oestrogen during early pregnancy.
abstract: Treatment of sows with 25 mg progesterone and 12.5 microgram oestrone daily between 14 and 23 days of gestation resulted in an increase of 15% of chorionic surface area and an increase in volume of allantoic fluid when examined at 30-35 days of gestation. In contrast, there were no significant differences in chorionic surface area or allantoic fluid volume between treated and control sows examined at 46-50 days of gestation. This suggests that progesterone-oestrone treatment of the sows during early pregnancy has only a short-lived effect on development of the allantochorion.
mesh_terms: D000482:Allantois / Q000187:drug effects; D000818:Animals; D002823:Chorion / Q000187:drug effects*; D004970:Estrone / Q000494:pharmacology*; D005260:Female; D005313:Fetal Death; D010920:Placenta / Q000187:drug effects; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology*; D013552:Swine / Q000502:physiology*
chemical_list: D004970:Estrone; D011374:Progesterone