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Vaginal bleeding in pregnancy

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Ultrasound in pregnancy Female reproductive anatomy Anatomy of a normal placenta Placenta previa Vaginal bleeding during pregnancy

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Vaginal bleeding in pregnancy

Definition:

Any vaginal bleeding during pregnancy.

Alternative Names:
Pregnancy - vaginal bleeding; Maternal blood loss

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Considerations:

Up to 10% of women have vaginal bleeding at some time during their pregnancy, especially in the first trimester (first 3 months). Bleeding is even more common with twins.

To help prevent a miscarriage or other problems during pregnancy, avoid smoking and the use of drugs of any kind, including alcohol. Eat a well-balanced diet, and obtain regular medical checkups.

Any vaginal bleeding at any point in pregnancy should always be reported to your doctor.

Common Causes:

Vaginal bleeding during the first 3 months of pregnancy may be an indication of a spontaneous abortion (miscarriage). See the doctor immediately.

Vaginal bleeding during the fourth to ninth month of pregnancy may be caused by a miscarriage, but may also be an indication of abnormal location of the placenta, such as placenta previa or abruptio placentae.

An ectopic pregnancy, in which the embryo becomes implanted outside the uterus, is often accompanied by unexpected vaginal bleeding and severe abdominal pain. Ectopic pregnancy is sometimes associated with current use of an IUD.

A cervical infection can cause bleeding at any time, including during pregnancy.

Trauma to the cervix from intercourse may cause a small amount of bleeding.

Early labor is sometimes accompanied by a small amount of bleeding (bloody show).

Note: There may be other causes of vaginal bleeding in pregnancy. This list is not all inclusive, and the causes are not presented in order of likelihood. The causes of this symptom can include unlikely diseases and medications. Furthermore, the causes may vary based on the age of the woman, as well as on the specific characteristics of the symptom such as quality, time course, aggravating factors, relieving factors, and associated complaints.

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