Human growth hormone (hGH) is linked to muscle mass, weight loss, and increased athletic performance. You produce hGH naturally, but you can also get injections of recombinant growth hormone (rhGH).

Placental growth hormone (PGH) is synthesized in and secreted from the human placental syncytiotrophoblast (1) into the maternal circulation in a nonpulsatile manner, detectable in the maternal ...