Birth bits 101: The amazing parts of a baby-growing body

Pregnant woman in her undies

There’s a lot to come to terms with when you get the news you’re expecting a baby, but for pregnant women, what’s happening inside their bodies is at the forefront of their concerns.

We’ve compiled a 101 to a few of the most important baby-growing birth bits. Take a tour around the amazing miracle of pregnancy!


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The uterus - or womb - is the pear-shaped reproductive organ where a baby grows. Prior to pregnancy, the uterus is about 3 cm thick, 4.5 cm wide and 7.6 cm long. During pregnancy, it grows to accommodate a baby's size. Women are very clever and versatile like that.

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