How your baby's growing: At 5 inches long (head to bottom) and 6 ounces of weight, your baby is about the size of an avocado this week. Some of her more advanced body systems are working now too, including the circulatory system and urinary tract. She's even begun inhaling and exhaling amniotic fluid so her lungs will be strong enough at birth to breathe.

How your life is changing: You've probably gained at least 5 pounds by now, maybe as many as 10. Your uterus is growing and you might feel pangs of pain caused by the ligaments stretching in your abdomen. You and your partner may be feeling a little stressed out now, too. Many pregnant couples worry about the baby's health, what labor will be like, how they'll cope as new parents. It's perfectly normal.

Pregnancy Tip: Feel Your Baby Move "I wasn't sure if I could feel my baby moving so a friend suggested I lie down for a while. After a few minutes, I started feeling a butterfly sensation in my lower abdomen. It was amazing!" --Linda B.