Although gonadotropins are secreted in a pulsatile manner (as a result of pulsatile GnRH release), unlike the case of GnRH and GnRH agonists , constant/non-pulsatile activation of the gonadotropin receptors by the gonadotropins does not produce functional inhibition. This can be seen during the first 7–10 weeks of pregnancy, where constantly high and progressively-increasing levels of hCG circulate and mediate production of estrogen and progesterone by the corpus luteum until the placenta takes over the production of these hormones. 
A 2006 discovery might have important implications for treatment of diabetes.   Researchers at the Toronto Hospital for Sick Children injected capsaicin into NOD mice (Non-obese diabetic mice, a strain that is genetically predisposed to develop the equivalent of Type 1 diabetes) to kill the pancreatic sensory nerves . This treatment reduced the development of diabetes in these mice by 80%, suggesting a link between neuropeptides and the development of Type 1 diabetes. When the researchers injected the pancreas of the diabetic mice with substance P, they were cured of the diabetes for as long as 4 months. Also, insulin resistance (characteristic of type 2 diabetes) was reduced. These research results are in the process of being confirmed, and their applicability in humans will have to be established in the future. Any treatment that could result from this research is probably years away.
α-Melanocyte-stimulating hormone (α-MSH) is a naturally occurring endogenous melanotan peptide hormone of the melanocortin family, which is considered to be the most important of the melanocyte-stimulating hormones when it comes to stimulating melanogenesis, a process which in mammals is responsible for hair and skin pigmentation. α-MSH also plays a role in feeding behavior, energy homeostasis, and sexual activity ( Bremelanotide and Melanotan 2). α-MSH is a nonselective agonist of melanocortin receptors MC1, MC3, MC4 and MC5. Melanotan 1 and Melanotan 2 activate the MC1 receptor, which is responsible for effects on skin pigmentation. Melanotan 2 and PT-141 both stimulate the MC3 and MC4 receptors which are responsible for the regulation of appetite, metabolism, and sexual behavior. However, PT-141 Bremelanotide does not stimulate the MC1 receptor.