oxytocin

https://doi.org/10.1351/goldbook.11061

Peptide hormone secreted by the neurohypophysis that stimulates contraction of the myometrium during labor and secretion of milk during lactation.

Note: Oxytocin is used clinically in the induction of labor and in the management of postpartum hemorrhage.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 789 [Terms] [Paper]