Pregnant at 4 Weeks

Your Child At 4 Weeks

• Sperm fertilized egg
• The new life, starting as just one cell,

   eventually implanted in lining of uterus

• Heart began to beat at 21 days
• Foundation has been laid for brain and

  spinal cord

• Brain and spinal cord begin to form
• Length is less than 1 inch

Your Symptoms At 4 Weeks

You just missed your period and the test came back positive -- that's right, you're pregnant! Can't bear to fasten your bra in the morning? For most women, breast tenderness is the first physical sign of pregnancy -- even before telltale morning sickness strikes. (If your breasts aren't sore now, odds are they will be within a few days or weeks.) You may also experience more extreme senses of taste and smell. In other words, that vase of peonies has never smelled better, but your coworker's tuna sandwich -- which he's eating three cubicles away -- might make you beeline for the bathroom. (Source: parents.com)

For a complete timeline of Fetal Development click here.