Equine Quick P4™ Progesterone Refill Kit
A Diagnostic Cube Reader Machine is programmed with sophisticated calculations using a standard curve to calculate concentration from the sample test and control lines.
√ Progesterone Numbers (ng/mL) for Equine Plasma is obtained in 15 minutes.
√ Room Temperature Stable
√ Shelf Life 1-2 yrs
√ Quick P4 measures only natural progesterone ( & NOT any synthetic progesterone).


To maintain a healthy pregnancy, ~ 4+ ng/ml progesterone is required. Measuring progesterone helps determine where the mare is in her cycle and allows planning most effective reproductive program.
For the ~ first 90 days of the pregnancy, progesterone is produced by the CL (corpus luteum) in the ovary. Later in the pregnancy progesterone is produced from the placenta.
*Article from MS Thesis, Swanand R. Sathe, Univ. IL, 2012