PMSG is a complex glycoprotein obtained from the serum of pregnant mares. This 43-63 kda protein is capable of supplementing and being substituted for the follicle stimulating gonadotrophin and interstitial cell-stimulating hormone of the anterior pituitary gland in both the male and female. Thus PMSG-Intervet stimulates development of the ovarian follicle in the female. Physical Appearance: Sterile Filtered White lyophilized (freeze-dried) powder. Formulation: Pregnant Mare Serum Gonadotropin was lyophilized from a concentrated (1mg/ml) solution with no additives. Stability: Lyophilized PMSG although stable at room temperature for 3 weeks, should be stored between 2-8°C. Please avoid freeze-thaw cycles. Protein content: Protein quantitation was carried out by two independent methods: 1. UV spectroscopy at 280 nm . 2. Analysis by RP-HPLC, using a calibrated solution of PMSG as a Reference Standard. Usage: For Laboratory Research Use Only. Purity : >98%