It may even seem like a late period.Īge plays a role in a woman’s risk factor. A woman can have a miscarriage in the first week or two without realizing she’s pregnant. These early weeks mark the highest risk of miscarriage. March of Dimes reports a miscarriage rate of only 1 to 5 percent in the second trimester. About 80 percent of miscarriages happen in the first trimester. The first trimester of pregnancy is considered weeks 0 to 13. This prevents nutrition and oxygen from getting to the baby-to-be, and prevents waste from being carried away. In the case of pregnancy, blood clots can form in the placenta. Examples include lupus anticoagulant and antiphospholipid syndrome. If a woman’s uterus didn’t form correctly when she was developing, it may be unable to support a healthy pregnancy.Ĭlotting disorders are conditions that cause your body to form more blood clots than normal. This refers to defects of the uterus cavity. Other infections that may pass to the baby or placenta can also affect a developing pregnancy and may lead to loss. Uterus or cervix infections can be dangerous to a developing baby and lead to miscarriage. This can occur more frequently in women who are considered advanced maternal age, or greater than 35 years old at pregnancy term. If something goes wrong when the cells are dividing, a chromosome may be missing or repeated.Ībout 50 percent of all first trimester miscarriages are because of chromosomal abnormalities. That’s 23 from one parent and 23 from the other. They then begin to divide to start forming the genetic material that makes up a person.Įach of us is supposed to have 46 total chromosomes. When the sperm and egg meet, the cells come together. Here are the five most common miscarriage causes. This will include reviewing your medical history in detail and performing certain tests. Most doctors will begin to investigate for a cause after you have had two to three losses. This includes maternal age and other medical conditions present. Several factors have to be accounted for in these cases, however. Conversely, some studies indicate that having a successful pregnancy before a current pregnancy may decrease the risk for miscarriage in the current pregnancy. Studies have shown an increased risk for miscarriage in women who have had recurrent miscarriages in the past. However, the likelihood of having recurrent miscarriages (at least 2 or 3) is low, only occurring in about 1 percent of women. “Women think that when they have one miscarriage, they are doomed to miscarry again,” he says. Kaylen Silverberg, a Texas-based fertility specialist, says miscarriages are very common.
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