title: Premenstrual levels of 17 beta oestradiol and progesterone in plasma in cycles of short and normal luteal phase length.
abstract: Premenstrual levels of 17 beta oestradiol and progesterone in plasma were compared between cycles of short or normal luteal phase length. Levels of progesterone and 17 beta oestradiol were higher premenstrually in cycles with short luteal phase lengths (11 or less days) that in cycles of normal luteal phase length (12 or more days). These findings suggest that reduction in the length of the luteal phase may arise because of a changed response of endometrium to withdrawal of 17 beta oestradiol and progesterone.
mesh_terms: D000328:Adult; D004958:Estradiol / Q000097:blood*; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000097:blood; D008183:Luteal Phase; D003341:Luteolysis; D008598:Menstruation; D011247:Pregnancy; D011374:Progesterone / Q000097:blood*
chemical_list: D011374:Progesterone; D004958:Estradiol