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Luteinizing Hormone and Gonadal Steroid Levels During the Menstrual Cycle of Orangutans
Author(s) -
Nadler Ronald D.,
Collins Delwood C.,
Blank Michael S.
Publication year - 1984
Publication title -
journal of medical primatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 42
eISSN - 1600-0684
pISSN - 0047-2565
DOI - 10.1111/j.1600-0684.1984.tb00154.x
Subject(s) - luteal phase , luteinizing hormone , endocrinology , medicine , menstrual cycle , testosterone (patch) , hormone , sex steroid , biology , steroid hormone , steroid
Scrum luteinizing hormone (LH), progesterone. 17 β ‐estradiol, and testosterone were measured during a single cycle each of five female orangutans, and urinary LH was measured in four of those cycles. Midcycle peaks in LH and luteal phase elevations in progesterone (5.7–13.8 ng/ml) suggested that the cycles were ovulatory. 17 β ‐Estradiol was elevated at midcycle (163–318 pg/ml) and during the luteal phase (56–136 pg/ml) and testosterone was also elevated at midcycle (143–580 pg/ml). These hormone patterns in the orangutans closely resemble those for chimpanzees, gorillas, and human females.