Guide to Being Four Weeks Pregnant

Don't Worry If...

If you've been taking birth control pills during your early pregnancy, it isn't a great cause for concern. According to the American College of Obstetricians and Gynecologists, it doesn't increase the risk of birth defects. However, a 2009 study does suggest an association between the use of birth control pills at the time of conception and low birth weight or premature delivery. So, it's best stop using the pill if you think you're pregnant. The same goes for a contraceptive patch and contraceptive implants.

Light spotting sometimes occurs around week four when the egg settles into your uterus. This is called implantation. As long as abdominal cramping and pain don't accompany the spotting, it probably isn't a cause for concern, but check with your doctor to be sure. On the flip side, don't worry if you don't have bleeding, as only a small percentage of women experience it.

You might end up having all or just some of the many symptoms that go along with early pregnancy. It's all a normal part of becoming a mom. But don't worry if you just feel wonderful. That's normal too.

Related Articles


  • Blott, Maggie "Pregnancy Day by Day." DK Publishing. 2009
  • Harms, Roger W. "Birth control pills: Harmful in early pregnancy?" August 6, 2009 (February 16, 2011)
  • Iovine, Vicki. "The Girlfriends Guide to Pregnancy." Pocket Books. January 2007
  • Konopicky, Kate. "100 Things I Hate About Pregnancy." Sourcebooks.Inc. 2006
  • Mayo Clinic staff. "First trimester pregnancy: What to expect." June 20, 2009 (February 16, 2011)
  • Murkoff, Heidi. "Week 4 of Pregnancy." What to Expect. (February 16, 2011)
  • Murkoff, Heidi. "Early Symptoms of Pregnancy." What to Expect. (February 22, 2011)
  • Nemours. "Your Baby's Development: Week 4" (February 28, 2011)
  • Nilsson. Lennart; Hamberger, Lars. "A Child Is Born." Delacorte Press. September 2003
  • Riley, Dr. Laura. "Getting Proof of Pregnancy." (February 16, 2011)
  • Riley, Dr. Laura. "Sex During Pregnancy." (February 16, 2011)
  • Riley, Dr. Laura. "The Fatigue Factor." (February 16, 2011)
  • Riley, Dr. Laura. "The Inside Story: Your Baby in Weeks 1 Through 4." (February 16, 2011)
  • Riley, Dr. Laura. "Your Hormones." (February 16, 2011)
  • Riley, Dr. Laura. "Your Partner: How Men React to Pregnancy." (February 16, 2011)
  • Similac StrongMoms™ "Wellness and Nutrition at 4 Weeks Pregnant." (February 16, 2011)
  • Similac StrongMoms™ "Your Changing Body at 4 Weeks Pregnant." (February 16, 2011)
  • Women's Healthcare Topics. "Pregnancy Week 4." (February 22, 2011)