physiological changes in pregnancy

Question 1

progesterone

Answer 1

uterus
-smooth muscle relaxation-prevents fatal expulsion
-cervical plug formation-microbial barrier
homeostasis
-respiratory centre-hyperventilation
-renin-angiotensin -Na+ reabsorption
breast
-lobular tissue development-but inhibits milk production

Question 2

oestrogen

Answer 2

uterus
-myometrial cell growth-for growing fetus
-connexin insertion-electrochemical links
-oxytocin receptor insertion-prepares for labour
-PGE2 production-softens cervix
breast
-breast duct development -but inhibits milk production

Question 3

human placental lactogen

Answer 3

maternal 
-insulin resistance 
-lipid breakdown 
-breast development 
fetal 
-promotes growth