Placenta previa can cause severe bleeding during pregnancy and delivery. If you have placenta previa, you might bleed throughout your pregnancy and during your delivery. Your health care provider will recommend avoiding activities that might cause contractions, including having sex, douching, using tampons, or engaging in activities that can increase your risk of bleeding, such as running, squatting, and jumping.
Bright red vaginal bleeding without pain during the second half of pregnancy is the main sign of placenta previa. Some women also have contractions. In many women diagnosed with placenta previa early in their pregnancies, the placenta previa resolves. As the uterus grows, it might increase the distance between the cervix and the placenta.
The more the placenta covers the cervix and the later in the pregnancy that it remains over the cervix, the less likely it is to resolve. If you have vaginal bleeding during your second or third trimester, call your doctor right away. If the bleeding is severe, seek emergency medical care. If you have placenta previa, your health care provider will monitor you and your baby to reduce the risk of these serious complications:.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. If placenta previa is present during labour and delivery, it can cause problems for both mother and baby.
Doctors aren't sure what causes this problem. But some things make you more likely to have it. These are called risk factors. You can't control most risk factors for placenta previa. For example, you're more likely to have it if you:. Some women with placenta previa don't have any symptoms. But others may have warning signs such as:. Most cases of placenta previa are found during the second trimester when a woman has a routine ultrasound. Or it may be found when a pregnant woman has vaginal bleeding and gets an ultrasound to find out what is causing it.
Some women don't find out that they have placenta previa until they have bleeding at the start of labour. A pelvic examination will not be done unless you need a C-section right away. A pelvic examination could injure the placenta and cause heavier bleeding.
The kind of treatment you will have depends on:. If your doctor finds out before your 20th week of pregnancy that your placenta is low in your uterus, chances are very good that it will get better on its own. The position of the placenta can change as the uterus grows. So by the end of the pregnancy, the placenta may no longer block the cervix. If you aren't bleeding, you may not need to be in the hospital. Weeks 28 through 40 bring the arrival of the third trimester.
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It's often benign. Postpartum diarrhea after a C-section is normal. Sharing our experiences of pregnancy and infant loss can help us heal. Health Conditions Discover Plan Connect. Parenthood Pregnancy Placenta Previa. Symptoms associated with placenta previa. Risk factors for developing placenta previa.
How is placenta previa diagnosed? Editorial team. Placenta previa. Sometimes, the placenta partly or completely covers the cervix. This is called a previa. There are different forms of placenta previa: Marginal: The placenta is next to the cervix but does not cover the opening.
Partial: The placenta covers part of the cervical opening. Complete: The placenta covers all of the cervical opening. Placenta previa occurs in 1 out of pregnancies. It is more common in women who have: An abnormally shaped uterus Had many pregnancies in the past Had multiple pregnancies, such as twins or triplets Scarring on the lining of the uterus due to a history of surgery, C-section, or abortion In vitro fertilization Women who smoke, use cocaine, or have their children at an older age may also have an increased risk.
Exams and Tests. Your health care provider can diagnose this condition with a pregnancy ultrasound. If the placenta is near or covering part of the cervix, your provider may recommend: Reducing your activities Bed rest Pelvic rest, which means no sex, no tampons, and no douching Nothing should be placed in the vagina.
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