Urinary Estrogens During Pregnancy of the Ruffed Lemur (Lemur Variegatus) 1 | Zendy

S. E. Shideler | Zendy; Nancy M. Czekala | Zendy; Kurt Benirschke | Zendy; B. L. Lasley | Zendy

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Urinary Estrogens During Pregnancy of the Ruffed Lemur (Lemur Variegatus) 1

Author(s) -

S. E. Shideler,

Nancy M. Czekala,

Kurt Benirschke,

B. L. Lasley

Publication year - 1983

Publication title -

biology of reproduction

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.366

H-Index - 180

eISSN - 1529-7268

pISSN - 0006-3363

DOI - 10.1095/biolreprod28.4.963

Subject(s) - lemur , estrone , biology , estrous cycle , endocrinology , estrogen , pregnancy , gestation , urine , medicine , creatinine , urinary system , excretion , primate , genetics , neuroscience

Pregnancy in the ruffed lemur (Lemur variegatus) was monitored by analyses of urinary estrogens. Urine samples were collected weekly throughout pregnancy (gestation: 100 +/- 1.6 days) from ten females analyzed for total immunoreactive estrogen (Et) and indexed by creatinine (Cr). Maternal urinary total estrogen excretion remained low until the last half of gestation at which time excretion increased steadily, reaching values 1000 times greater than those observed at estrus. Chromatographic separation after enzyme hydrolysis of lemur urine indicates that estrone is the major estrogenic component of pregnancy in the ruffed lemur, with the remaining components consisting of equal amounts of estradiol-17 alpha and -17 beta.

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