Patterns of excretion of fecal estradiol and progesterone and urinary chorionic gonadotropin in Grevy’s zebras (Equus grevyi): Ovulatory cycles and pregnancy

Abstract The ovulatory cycle and pregnancy of the endangered Grevy’s zebra (Equus grevyi) was characterized by analyzing excretion patterns of fecal estradiol and progesterone. Pregnancy was further described by assay of urinary equine chorionic gonadotropin. Courtship and mating behavior were similar to that seen in the domestic horse, but cycle length was longer, ranging from […]