Between 15 and 25 percent of people spot during early pregnancy. Some of the causes are:. This happens in the earliest stages of pregnancy. This type of bleeding occurs when the fertilized egg implants into the uterus, usually around the time your period would be expected.
Implantation bleeding is sometimes mistaken as a period, though the bleeding is usually light or just spotting. Shortly after pregnancy, you might also experience spotting from cervical changes. Bleeding beyond the first trimester often requires medical attention. Regardless of whether bleeding during the second and third trimester is light or heavy, with or without any other symptoms, you need to call your doctor for an emergency visit.
This refers to any birth that happens before 37 weeks. Before preterm labor, some people experience symptoms similar to a period as well as a large amount of mucus discharge.
While cramping may also be felt, preterm labor also causes contractions. Symptoms of preterm labor might also include:. This happens when the placenta is implanted low in the uterus and very close to, or covers, the cervix. The bleeding varies, but there are no other symptoms. Placenta previa can hinder labor and delivery. This occurs most commonly during the last few months of pregnancy. The placenta detaches from the uterus, usually causing heavy bleeding and possibly severe stomach pain and cramping.
Certain health conditions, such as high blood pressure, can increase the risk of placental abruption. If you're pregnant, an egg has already been fertilized and is growing as an embryo within the walls of your uterus.
Since your womb lining is not being discarded at the end of each month, you no longer have a period. This is why one of the early signs of pregnancy is a missed period. Although you can't have your period and be pregnant, bleeding while expecting—especially in the first trimester—is not uncommon.
According to Dr. Hakakha, women can bleed in pregnancy for a variety of reasons. Here are a few common ones. The bleeding may look like the normal start of your period. There's also the possibility of postcoital bleeding bleeding after sexual intercourse , says Melissa Esposito, M. You might also bleed after a pelvic exam because your cervix is more sensitive while pregnant. Most pregnancy losses occur during the first 12 weeks of pregnancy. A miscarriage or a threatened miscarriage usually presents as bleeding associated with uterine cramping.
There may also be a passage of large clots from the vagina. If you have these symptoms, alert your doctor right away. This spotting has been called " implantation bleeding " because of the idea that it might be caused by the fertilized egg burrowing into the blood-rich lining of the uterus.
But no one knows what really causes it. You may have spotting after a Pap smear, vaginal exam, or sex. This is because there's more blood going to your cervix during pregnancy.
Bleeding can also be a sign of something seriously wrong, such as an infection, placental problems, miscarriage , or an ectopic pregnancy , which can be life-threatening. See our article on vaginal bleeding in pregnancy for a complete rundown of possible causes. If you notice bleeding while you're pregnant, call your doctor or midwife right away, even if the bleeding has stopped.
Many women who bleed a little during pregnancy deliver without complications, but you may need an evaluation to rule out a serious problem. If you're actively bleeding or have severe pain of any kind and can't immediately reach your practitioner, head straight to the emergency room.
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Learn more about our editorial and medical review policies. FAQ Bleeding during pregnancy. American College of Obstetricians and Gynecologists. Mayo Clinic.
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