Is bleeding during pregnancy dangerous?
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) might occur, 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 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.
Causes
Vaginal bleeding during pregnancy has many causes. Some are serious, and many aren't.
1st trimester
Possible causes of vaginal bleeding during the first trimester include:
- Ectopic pregnancy
- Implantation bleeding
- Molar pregnancy (a rare occurrence in which an abnormal fertilized egg develops into abnormal tissue instead of a baby)
- Problems with the cervix, such as a cervical infection, inflamed cervix or growths on the cervix
2nd or 3rd trimester
Possible causes of vaginal bleeding during the second or third trimester include:
- Placental abruption
- Miscarriage
- Preterm labor
- Cervical infection
- Uterine rupture
- Problematic cervix
Normal vaginal bleeding near the end of pregnancy
Light bleeding, often mixed with mucus, near the end of pregnancy could be a sign that labor is starting. This vaginal discharge is pink or bloody and is known as bloody show.
When to see a doctor
It's important to report any vaginal bleeding during pregnancy 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
- Inform your health care provider if your blood type is Rh negative and you experience bleeding because you might need a medication that prevents your body from making antibodies that may be harmful to your future pregnancies
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 few hours 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 or vaginal bleeding accompanied by abdominal pain.
Source:
https://www.mayoclinic.org/symptoms/bleeding-during-pregnancy/basics/definition/sym-20050636
