An important function of progesterone dr. fessler said is that it dials down an early-warning part of the immune system inflammation which might prevent the embryo or conceptus from implanting itself in the placenta .

费斯勒博士认为，减轻免疫系统早期预警阶段即炎症反应是黄体酮的重要功能之一，炎症反应会阻碍孕体将自身植入胎盘中。