Like HowStuffWorks on Facebook!

Guide to Being 22 Weeks Pregnant

What's Going on in Your Body

Your baby now measures about 7.5 to 8 inches (19 to 20.3 centimeters) long and weighs more than 12 ounces (340.2 grams).

He or she has taste buds, tooth buds (though his baby teeth won't poke through the gums until about 8 months after birth), eyelids and eyebrows, and a fairly well developed sense of touch. If you happen to have an ultrasound this week, you might see her sucking a thumb or notice him testing that new sensation at the end of his fingers by touching his face.

Your baby's ears are working very well now, and he's starting to know your voice. He or she may even respond to other sounds outside your body.

The baby continues to beef up -- building muscle, bone and fat -- and is looking less like an alien and more like a real human infant every day. This is a good thing, not only because it means that your baby is one step closer to surviving and thriving on its own, but also because an alien baby might be pretty tough to explain to your partner in the delivery room.

And speaking of your partner ...