Many mothers feel this month of pregnancy - from the 17th week through the 21st - is one of the most rewarding. You're probably feeling pretty good, and it's now obvious to the whole world that you're growing a baby. Expect to be on the receiving end of the perks of being pregnant as well as the unwanted advice. You go public in your lead role in the most awesome drama of life. Better yet, you can now feel your little co-star moving. And this month you reach a milestone in your pregnancy - believe it or not, you are halfway there!