Multiple choice Which of the following hormones helps in the contraction of uterus during child birth? Vasopressin Somatotropin Thyroxin Calcitonin Oxytocin Reveal answer Fill a bubble to check yourself E Correct answer Explanation Oxytocin is secreted by the posterior lobe of pituitary, and stimulates vigorous contractions of the uterus in a pregnant woman leading to the birth of the baby.