Progesterone and the pregnant mare: unanswered chestnuts.
Allen
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WR
D000818:Animals; D005260:Female; D006736:Horses / Q000502:physiology*; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000502:physiology*; D011374:Progesterone / Q000502:physiology*
D011374:Progesterone