Your baby measures about 3.2 to 4.1 inches from crown to rump now and weighs almost an ounce. The ears are shifting from the neck to the sides of the head, and the neck is getting longer and chin more prominent. Facial features and unique fingerprints are all there. Your baby is beginning to respond to outside stimuli. If your abdomen is poked, the fetus will try to wriggle away. (webmd.com)
According to webmd, that is what is going on with the baby. I laughed because it also said the following for mom to be, "You're probably wearing maternity clothes now. Your skin and muscles are starting to stretch to accommodate your growing baby." Yea, I'm still in all my normal clothes and have gained a whopping half a pound. And now that I have made that comment, I will probably wake up tomorrow with a bulging belly and five pounds heavier. HA!