HCG Pregnyl 5000iu is an post cycle steroid and is made by Organon. The active substance is Human Chorionic Gonadotropin.
HCG, is not an anabolic/androgenic steroid but a natural protein hormone which develops in the placenta of a pregnant woman. HCG is formed in the placenta immediately after nidation. It has luteinizing characteristics since it is quite similar to the luteinizing hormone LH in the anterior pituitary gland. During the first 6-8 weeks of a pregnancy the formed HCG allows for continued production of estrogens and gestagens in the yellow bodies (corpi luteum). Later on, the placenta itself produces these two hormones. HCG is manufactured from the urine of pregnant women since it is excreted in unchanged form from the blood via the womans urine, passing through the kidneys. The commercially available HCG is sold as a dry substance and can be used both in men and women. In women injectable HCG allows for owlation since it influences the last stages of the development of the ovum, thus stimulating ovulation. It also helps produce estrogens and yellow bodies.