The use of a urinary estrone conjugates assay for detection of optimal mating time in the cynomolgus macaque (Macaca fascicularis).

Journal Article (Journal Article)

Forty-four female cynomolgus macaques (Macaca fascicularis) were examined to determine the optimum fertile period for mating. Daily urinary estrone conjugates (E1C) were measured, beginning on day 7 of the menstrual cycle, until a 1.5-gold E1C rise above the baseline was detected. The females were bred the next morning. Pregnancies were verified in all animals at day 18 postbreeding, and/or on day 25 postbreeding. Serum progesterone levels were used to correlate the relationship between ovulation and the E1C peak. Forty-four of the 57 cycles indicated a urinary E1C peak between days 10-15 of the menstrual cycle; this peak occurred on the day following the initial 1.5-fold to twofold rise in 90% of the cycles. A single 2-hr mating period the day before, the day of, or the day after the E1C peak resulted in conception in 17 of 44 (38.6%) animals.

Duke Authors

Cited Authors

  • Behboodi, E; Katz, DF; Samuels, SJ; Tell, L; Hendrickx, AG; Lasley, BL

Published Date

  • July 1991

Published In

Volume / Issue

  • 20 / 5

Start / End Page

  • 229 - 234

PubMed ID

  • 1920378

Electronic International Standard Serial Number (EISSN)

  • 1600-0684

International Standard Serial Number (ISSN)

  • 0047-2565


  • eng