Third Trimester 1^stTrimester     2^ndTrimester

In the brain, nerve cells are developing into distinct areas that will eventually control specific functions such as memory and coordinated movement. As yet, the neural network is very immature.

At 30 weeks the average crown to heel length is 14.8 in (37.6 cm) and the average weight is 2.2 lb (1 kg).

The tip of your baby's nose is still upturned and the bridge is becoming more evident.

The amniotic sac has finished growing and is no longer forming new cells. Because the membranes of the sac are highly elastic, they keep stretching as the baby gets bigger.

You are still feeling a lot of strong kicks, although the baby is moving around less.

The nest-building instinct often kicks in as a woman approaches her due date. You may be overwhelmed with the urge to clean and decorate, but although it's natural to want a perfect home for your baby don't wear yourself out. Work, traveling, and a constant round of prenatal appointments are probably all much more of an effort these days. If you need to keep stopping to rest, listen to your body and do just that.

Excerpted from Pregnancy Day by Day.
Copyright © 2009 Dorling Kindersley Limited.
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