DISTRIBUTION OF CYTOSOLIC ESTROGEN AND PROGESTERONE RECEPTORS IN THE GENITAL-TRACT OF THE MARE

The distribution of oestrogen and progesterone receptors in the equine genital tract was investigated by means of a modified dextran-coated charcoal method on samples collected from the vagina, the cervix and t he uterus of 30 healthy adult Polish mares, divided into two groups on the basis of their serum progesterone levels. The concentrations of o estrogen and progesterone receptors were significantly (P<0.05) lower in the vagina and the cervix than in the uterus, in agreement with dat a from human beings, cattle and pigs, which showed that the highest co ncentrations of oestrogen and progesterone receptors were localised re spectively in the body and in the hems of the uterus.