Our baby is 20 4/7 weeks today.

"At 20 weeks - The child can hear and recognize her [or his] mother's voice. The child sucks its thumb. The baby may jump in reaction to a loud noise. Though still small and fragile, the baby is growing rapidly and could possibly survive if born at this stage. Fingernails and fingerprints are present...."

If you want an idea of approximately how big our baby is at this point click on the title of this post. It is linked to an image of someone holding a fetus that is 20 weeks old.