Urinary steroids have been studied during early and late pregnancy in
domestic horses or sporadic samples at various stages of pregnancy in wild
equidae. In our studies, urinary estrone sulfate (E1S) and pregnanediol
glucuronide (PdG) were monitored throughout pregnancy in six pony mares by
enzyme immunoassay (EIA). Both hormones were...
Mares have an atypical hormone profile during pregnancy. Systemic progesterone (P4) levels approach zero by day 220 of gestation. Other reduced pregnanes such as 5α-pregnane-3, 20-dione (5α), 5α-pregnane-3β, 20α-diol (βα), 3β-hydroxy-5α-pregnan-3-one (3β) and 20α-hydroxy-5α-prenan-3-one (20α), increase to near μg/mL levels in the peripheral system of the mare until directly before...
Aims of this research were to find the time period and specific progestins
reflective of the transition from ovarian source to placental source during early gestation
in mares. An attempt was made to describe an accurate profile of total and individual
progestins in plasma and feces from 64 to 150...
Published September 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog