Some women are born with a septum, an uncommon uterine defect linked to miscarriage. Women may develop bands of scar tissue in the uterus from surgery or second-term abortions; this scar tissue can keep an egg from implanting properly and may hamper blood flow to the placenta. Listeria , a bacteria that may be present in undercooked meats, raw eggs, and unpasteurized dairy products Maternal trauma, such as a car accident Certain medication Advanced maternal age over 35 Infections such as Lyme disease or Fifth disease Air pollution—A February study published in Fertility and Sterility found that increased short-term exposure to nitrogen dioxide correlated with a higher risk of miscarriage.
High fever above degrees during early pregnancy—A high core body temperature is most damaging to the embryo before 6 weeks. Comments 1. Sort by: Newest. Newest Oldest. Load More Comments. Close this dialog window Add a comment. Add your comment Cancel Submit. Close this dialog window Review for. Back to story Comment on this project. Tell us what you think Thanks for adding your feedback.
All rights reserved. Molar and partial molar pregnancies are not viable pregnancies. Molar and partial molar pregnancies can sometimes be associated with cancerous changes of the placenta. Some women who miscarry develop an infection in the uterus. This is also called a septic miscarriage. Signs and symptoms of this infection include:. Often, there's nothing you can do to prevent a miscarriage. Simply focus on taking good care of yourself and your baby:. Mayo Clinic does not endorse companies or products.
Advertising revenue supports our not-for-profit mission. This content does not have an English version. This content does not have an Arabic version. Overview Miscarriage is the spontaneous loss of a pregnancy before the 20th week.
Request an Appointment at Mayo Clinic. More Information Blighted ovum: What causes it? Share on: Facebook Twitter. Show references Tulandi T, et al. Spontaneous abortion: Risk factors, etiology, clinical manifestations, and diagnostic evaluation. Accessed May 15, Strand EA. Increasing the management options for early pregnancy loss: The economics of miscarriage.
PCOS is known to be a leading cause of infertility as it can lower the production of eggs. There's some evidence to suggest it may also be linked to an increased risk of miscarriages in fertile women. Many women who have a miscarriage worry they'll have another if they get pregnant again.
But most miscarriages are a one-off event. Page last reviewed: 01 June Next review due: 01 June First trimester miscarriages First trimester miscarriages are often caused by problems with the chromosomes of the foetus. Chromosome problems Chromosomes are blocks of DNA.
Placental problems The placenta is the organ linking the mother's blood supply to her baby's. Things that increase your risk An early miscarriage may happen by chance. These include: diabetes if it's poorly controlled severe high blood pressure lupus kidney disease an overactive thyroid gland an underactive thyroid gland antiphospholipid syndrome APS Infections The following infections may also increase your risk: rubella german measles cytomegalovirus bacterial vaginosis HIV chlamydia gonorrhoea syphilis malaria Food poisoning Food poisoning , caused by eating contaminated food, can also increase the risk of miscarriage.
For example: listeriosis — most commonly found in unpasteurised dairy products, such as blue cheese toxoplasmosis — which can be caught by eating raw or undercooked infected meat salmonella — most often caused by eating raw or partly cooked eggs Read more about foods to avoid in pregnancy.
Many experts define a stillbirth as the death of a baby after the 20th week of pregnancy. It can happen before delivery or during labor or delivery. A stillbirth also is sometimes referred to as intrauterine fetal death or antenatal death. There are some known risk factors for stillbirth, such as smoking, obesity, problems with the placenta, a pregnancy lasting longer than 42 weeks, and some infections. The most common sign of a stillbirth is decreased movement in the baby.
If you notice your baby moving less than usual, call your doctor right away. Your doctor can use an ultrasound to look for the heartbeat or, later in pregnancy, give you a fetal non-stress test. This involves lying on your back with electronic monitors on your abdomen. The monitors record the baby's heart rate and movements, and contractions of the uterus.
The most common cause of pregnancy loss is a problem with the chromosomes that would make it impossible for the fetus to develop normally. If a woman miscarries, her doctor will do a pelvic exam and an ultrasound to confirm the miscarriage.
Sometimes, the uterus still contains the fetus or other tissues from the pregnancy. A doctor will need to remove this. The doctor may give medicine to help pass the tissue or may dilate the cervix to do:.
After the delivery, the doctor will have the baby and the placenta examined to help find the cause of death if it's still unknown. Women who have had several miscarriages may want to get checked to see if any anatomic, genetic , or hormonal problems are making miscarriages more likely. Still, some things — such as smoking and drinking — put a woman at a higher risk for losing a pregnancy.
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