From the "Pregnancy Calendar"

Size
Your baby is 2 1/2 to 3 inches long, the size of a medium goldfish. She weighs about one ounce.

Development
Your baby is shorter than a finger, but her face is already showing individual features and characteristics! Her ears are now developed enough that she may be able to hear when you sing, hum, or talk. And her vocal cords will form this week - soon she'll be able to sing back.

Reprinted with permission from Great Expectations: Your All-in-One Resource for Pregnancy & Childbirth. Copyright 2004 by Sandy Jones, MA and Marcie Jones, MA. Used with permission from Barnes & Noble Books, an imprint of Barnes & Noble Publishing, Inc.