What does PMU mean?

PMU stands for Pregnant Mares’ Urine. Pfizer harvests the urine of pregnant mares to make menopausal drugs: Premarin, PremPro, PremPhase, and DUAVEE.

PMU Farms

While a horse is pregnant at a PMU farm, they must stand in tight stalls where they can’t move very much, if at all. They have to wear an uncomfortable harness which scrapes and chafes their skin. The mares’ water intake is reduced so their urine contains a higher hormone potency. After each mare’s 11- to 12-month pregnancy, they are reimpregnated and continue for another year. The foals, and the mares when they are no longer fertile, are often sent to slaughter. PMU farms exist in Canada, China, Kazakhstan, and Poland. In 2015, there were 90,000 pregnant mares on PMU Farms in China alone.