Figure 2.
Plasma P4 profiles, first P4 rise (age at puberty; mean ± sem), and end of the first breeding season for control (C), OFC, T, and OFT females. Biweekly P4 levels were measured starting a few weeks before the expected time of puberty and ending a few weeks after the expected end of the breeding season. The vertical gray line indicates when sampling began during the periovulatory dynamics assessment. Bar graphs show first P4 rise (puberty) and end of breeding season. Bars with different letters (a vs. b and x vs. y) differed; P < 0.05.