Relaxin during pregnancy is secreted by :
High-Yield Explanation
It is a peptide hormone structurally related to insulin. The main source of production is the corpus luteum of the ovary but pa of it may be also produced by the placenta and decidua. It has been claimed that relaxin relaxes myometrium, the symphysis and sacroiliac joints during pregnancy and also helps in cervical ripening by its biochemical effect. Reference:textbook of obstetric,Dutta,7nd edition,page no:68