What is the baby up to now?

"At around 4 inches long, crown to rump, your baby now weights about 2-1/2 ounces. He's/she's busy inhaling and exhaling amniotic fluid, which will help the air sacs in his/her lungs develop. Sweat glands are appearing, and although his/her eyelids are fused shut, he/she can sense light. If you were to shine a flashlight at your tummy, he'd/she'd most likely move away from the beam. If you're scheduled for an ultrasound in the coming weeks (most women have one between 16 and 20 weeks), you may be able to find out whether your baby's a boy or a girl! "