This category features reproductive peptides for research into the endocrine system. It includes gonadotropins like hCG and GnRH analogs such as Kisspeptin. Researchers use these molecules to study the hypothalamic-pituitary-gonadal (HPG) axis. They are essential tools for investigating fertility, hormone regulation, and reproductive health in preclinical models. All compounds are intended for in-vitro laboratory research use only.