The increased contraction of the human uterus during labor and delivery is at least partially due to the actions of Naim 02:18 AP Biology Chapter 32 The increased contraction of the human uterus during labor and delivery is at least partially due to the actions of A) oxytocin. B) ecdysteroid. C) glucagon. D) thyroxine. E) growth hormone. Answer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+