Learn about your baby's development from conception through the fourth month of your pregnancy in this Pregnancy Week by Week guide.
http://www.thepregnancyzone.com/pregnancy-weeks/13-weeks-pregnant/
http://www.thepregnancyzone.com/pregnancy-weeks/14-weeks-pregnant/
http://www.thepregnancyzone.com/pregnancy-weeks/15-weeks-pregnant/
http://www.thepregnancyzone.com/pregnancy-weeks/16-weeks-pregnant/
