Testosterone and progesterone in peripheral plasma during the oestrous cycle of the mare

Publisher Website
Google Scholar
Abstract
Measurements every day or every other day showed that testosterone levels ranging from 15-70 pg/ml were higher at estrus in 4 of the 6 mares studied. In these 4 mares, another testosterone peak occurred 11-13 days before the next estrus either before (3 mares) or after the fall in progesterone levels.