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iVillage Staff on Apr 27, 2010 at 9:22PM
chime in nowThis illustration shows just how human baby is starting to look. In fact, research suggests that if we examined baby’s knee joints at this point they wouldn’t look all that different from our adult knees. It may feel like there’s a gym class going on in your expanding belly. That’s because baby has even more amniotic fluid to splash around in and also has the muscle strength and coordination to spin, turn and somersault.
Get more information on being 21 weeks pregnant.