The Treatment of Premarin Mares and Foals
We will start at the point of collecting the urine for this drug. There are farms called Pregnant Mare’s Urine (PMU) farms. If you were to visit one of these farms, you would find a barn full of pregnant mares (horses) that are locked in 3x8 foot stalls, forced to stand for 11 months (a horse’s natural gestation period) with a “urine collector” hooked to them. One mare provides approximately nine women with estrogen replacement for one year. These mares are turned out at birthing time to give birth and be rebred. Seeing as the mare must be pregnant to be of use to the farms, if the mare does not rebreed within a month and a half, the mare will be put
to pasture along with all the foals that go to the “last chance corral” where they have the ability to be adopted or they will be sent to slaughter.