About halway between menstrual periods, the ovum is released. Estrogen and _________ stimulate further build up of the uterine lining.

The missing word in your sentence is "progesterone". So, the complete sentence is: "About halfway between menstrual periods, the ovum is released. Estrogen and progesterone stimulate further build up of the uterine lining." Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem. Knowee AI StudyGPT is a powerful AI-powered study tool designed to h