Second Trimester 1^stTrimester     3^rd Trimester

Tooth buds, for both the milk teeth and the underlying permanent teeth, are now in place under the gums.

Abdominal organs, including the stomach, intestines, and liver, are fully enclosed within the abdominal cavity.

At 20 weeks the average crown to heel length is 8.7 in (22 cm) and the average weight is 6.7 oz (190 g).

The spine is now quite straight. Your 20-week scan will reveal each vertebra.

The baby's body has a covering of fine hair, called lanugo hair. Most of this hair disappears before birth, although it may still be present in very premature babies.

The eyebrows have thickened and are clearly visible.

In the next few days, you might feel your baby's movements for the first time. The little flutter can be such a tiny sensation that many women write it off as gas. But what a wonderful moment when you realize the truth! If you want to find out the sex of your baby, it could be revealed on the ultrasound scan you have this week.

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