Reproductive System Plush Toys - Female Toy Figures - Sex Ed ModelsBirth is an incredible process directed by hormones and carried out by your organs. Typically, childbirth is kicked off by stress -- at the end of gestation, baby is running out of room and wants to get out. Corticotropin-releasing hormones and cortisol from baby's adrenal glands send an evacuation notice to mom's body: "GET ME OUTTA HERE!" The cortisol then pumps up estriol, a type of estrogen present during pregnancy. Estriol slows down progesterone made by placenta and helps co-ordinate uterine contractions. As estrogen starts contractions, the uterus makes prostaglandins, which also force progesterone levels down. Prostaglandins also make you poop and, along with the hormone relaxin (yes, this is a real, actual hormone name) from the ovaries, get the cervix to soften and dilate to let baby through to the vaginal canal. And that's just the beginning!

Don't forget about mom. She's tough as nails!

Mother's Day is May 14.

Mama Uterus Reads to Baby UterusWhat mamma uterus reads to baby uterus at bedtime. Follow I Heart Guts on Facebook and Instagram @iheartguts for more ridiculous fun.
For many of us, our feelings often surrender to our gonads and the hormones they produce.  Ovary prefers a variety of emotions.  As for Testicle...well, let's just say he likes things simpler.  But, whether you're controlled by Ovaries or Testicles, sometimes it's hard to explain how you're feeling without all that awkward talking.  Here at Guts HQ, Ovary and Testicle have designed these handy visual Mood Wheels so you can more easily share your innard feelings with your partner, friends, and family.  Download, print, and attach to your refrigerator! Ctrl-click (Mac) or right-click (PC) on the thumbnails below to download a high resolution JPG for printing. Ovary (1.7 MB) MoodWheel-OvaryTHUMB Testicle (1.8 MB) MoodWheel-TesticleTHUMB