Vaginal bleeding during pregnancy can be scary. However, it isn't always a sign of trouble. Bleeding in the first trimester (weeks one through 12) is common, and most women who experience bleeding during pregnancy go on to deliver healthy babies.

Still, it's important to take vaginal bleeding during pregnancy seriously. Sometimes vaginal bleeding during pregnancy indicates an impending miscarriage or a condition that needs prompt treatment. By understanding the most common causes of vaginal bleeding during pregnancy, you'll know what to look for — and when to contact your health care provider.

Vaginal bleeding during pregnancy has many causes. Some are serious, and many aren't.

It's important to report any vaginal bleeding during pregnancy —other than bloody show — to your health care provider. Be prepared to describe how much blood you passed, what it looked like, and whether it included any clots or tissue.

1st trimester

During the first trimester (weeks one through 12):

  • Tell your health care provider at your next prenatal visit if you have spotting or light vaginal bleeding that goes away within a day
  • Contact your health care provider within 24 hours if you have any amount of vaginal bleeding that lasts longer than a day
  • Contact your health care provider immediately if you have moderate to heavy vaginal bleeding, pass tissue from your vagina, or experience any amount of vaginal bleeding accompanied by abdominal pain, cramping, fever or chills

2nd trimester

During the second trimester (weeks 13 through 24):

  • Contact your health care provider the same day if you have light vaginal bleeding that goes away within a few hours
  • Contact your health care provider immediately if you have any amount of vaginal bleeding that lasts longer than a day or is accompanied by abdominal pain, cramping, fever, chills or contractions

3rd trimester

During the third trimester (weeks 25 through 40):

  • Contact your health care provider immediately if you have any amount of vaginal bleeding before 37 weeks or vaginal bleeding accompanied by abdominal pain.

In the final weeks of pregnancy, remember that vaginal discharge that is pink or bloody (bloody show) is a normal sign of impending labor.

Apr. 09, 2014