Usually when you talk about muscle strength you need to consider force per mass. With this in mind, this makes the myometrial layer of the uterus the strongest muscle in the human body relative to its weight. This achievement is based on the ability of the uterus (aproximate weight is around 35 – 40 ounces after birth) to deliver an average 7lbs infant. This myometrial layer of the uterus can exert a downward force of 100 to 400 N (25 to 100 lbs) with each contraction. Source
I am Joy, a happily married mother of two waterbirthed babies. I am a doula and a Lamaze Certified Childbirth Educator, who worked as a midwife's assistant at a freestanding birth center in TX. As of 2015, I'm a full-time nursing student who teaches childbirth classes at Park Ridge Health, The Baby Place, in Hendersonville, NC. I love serving laboring moms and I enjoy teaching birth education. I use this blog to write about it all - my life, my children, and my passion of all things childbirth.
The Joy of This 
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