Definition of nest for English Language Learners. : the place where a bird lays its eggs and takes care of its young. : a place where an animal or insect lives and usually lays eggs or takes care of its young.
Hormones for Fertility. Gonadotropins are hormones which stimulate the gonads, which are the ovaries or testes. Yes, gonadotropins work on men, as well! Gonadotropins are injectable fertility drugs which contain follicle stimulating hormone, or FSH, luteinizing hormone, or LH, or both.They are given to women to help your body make the hormones needed for egg production.They may also be used for men with low testosterone and FSH to promote sperm formation.onadotropins are injectable fertility drugs which contain follicle stimulating hormone, or FSH, luteinizing hormone, or LH, or both. They are given to women to help your body make the hormones needed for egg production. They may also be used for men with low testosterone and FSH to promote sperm formation.
The two principal gonadotropins in vertebrates are luteinizing hormone (LH) and follicle-stimulating hormone (FSH), although primates produce a third gonadotropin called chorionic gonadotropin (CG). LH and FSH are heterodimers consisting of two peptide chains, an alpha chain and a beta chain.onadotropins are released under the control of gonadotropin-releasing hormone (GnRH) from the arcuate nucleus and preoptic area of the hypothalamus. The gonads â testes and ovaries â are the primary target organs for LH and FSH.