<prompt> The probable source of relaxin is:OvaryAdrenal cortexLiverBartholins gland  <response>: Relaxin is a peptide hormone. It is produced by the ovary to be specific by the corpus luteum of pregnancy If corpusluteum is in options, it should be the answer of choice. It has also been identified in : placenta decidua chorion It is not detected in men and non pregnant women. Levels of Relaxin rise during 1st trimester when corpus luteum is dominant and declines in the second trimester. Thissuggests a role in maintaining early pregnancy. In animals, relaxin softens the cervix, inhibits uterine contractions and relaxes public symphysis. It has no effect on prolactin secretion but enhances growth hormone secretion by the pituitary. 