Week 24

This week Baby prepares herself for a big, lusty cry upon arrival. Her lungs are beginning to produce surfactant, a wetting agent that will help her breathe correctly and will keep her tiny lungs from collapsing or sticking together. Blood vessels and air sacs are developing in the lungs and will eventually exchange oxygen and circulate it to all parts of Baby's body.
Baby still has a lot of growing to do. At 1.2 pounds and eight to nine inches, she should add at least another five pounds before birth for optimum health.
This week, the following developments may occur:
* The inner ear, which controls balance, will become fully formed. This means that your baby may be able to tell when she is upside down or right side up while floating in the amniotic fluid.
* Baby will continue to explore her internal environment, flexing her fingers and touching her surroundings. (verybestbaby.com)