This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'The probable source of relaxin is: \nSelect and explain. \nA. Ovary, B. Adrenal cortex, C. Liver, D. Bartholins gland', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • Relaxin is a peptide hormone.\xa0It is produced by the ovary\xa0to be specific by the corpus luteum of pregnancy\xa0If corpus\nluteum is in options, it should be the answer of choice. It has also been identified in :\n– placenta\n– decidua\n– chorion\n• It is not detected in men\xa0and non pregnant women.\n• Levels of Relaxin rise during 1st trimester when corpus luteum is dominant and declines in the second trimester. This\nsuggests a role in maintaining early pregnancy.\n• In animals, relaxin softens the cervix, inhibits uterine contractions and relaxes public symphysis.\n• It has no effect on prolactin secretion but enhances growth hormone secretion by the pituitary.', 'role': 'assistant'}]