Your baby is practicing sucking and swallowing as she gets ready for the real thing: a breast or bottle! As for Mom, you may be warding off some unwanted belly touching. What’s up with your baby? She’s about the size of your palm, weighs about five ounces, and she’s developing some body fat (join the club, baby!). Her heart is now regulated by her brain (no more random beats) to beat 140 to 150 times per minute — about twice as fast as yours!