26 Weeks

Air sacks are developing in baby's lungs, which means it just might be possible for baby to take a breath at the end of this week. The air sacks (technically called alveoli) will continue to grow for the next nine years. The membrane that keeps the alveoli separate from the blood vessels is now thin enough to allow for that oxygen–carbon dioxide exchange we call breathing.

Brainwaves for the auditory and visual systems are detectable in baby's noggin this week. That means baby's brain is registering things like sound and light. She can't understand what any of it means yet, but she's on track to comprehend an entire episode of Blue's Clues in no time!

Baby has now completed two-thirds of her stay in Hotel Womb. Baby is about 1 2/3 pounds and is 14 inches long head-to-heel, or about the length of a burp cloth.

We start our childbirth classes this Monday. This is my last week in the second trimester, next week we're onto the third and final. 97 days to go!