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Why Miscarriages Occur In 2nd Trimester

Why Miscarriages Occur In 2nd Trimester

Miscarriages in the second trimester are much rarer than in the first trimester. Once a pregnancy gets to about 20 weeks gestation, the chances of one occurring are only about 1 to 2 per cent.

Possible causes are:

Incompetent Cervix. A condition that occurs when weak cervical tissue causes or contributes to a miscarriage or premature delivery.

Chromosomal Abnormality. Conditions such as Edwards’ syndrome and Patau’s syndrome are rare chromosomal abnormalities that can lead to miscarriage.

Poorly controlled thyroid disease. Both hypothyroidism and hyperthyroidism have been linked with miscarriage risks.

Large uterine fibroids. These can cause an increased miscarriage risk if they are in particular areas of the uterus, or if they start to grow in response to pregnancy hormones.

Poorly controlled chronic diseases. Pregnant women with kidney disease, and diabetes are at higher than usual risk of miscarrying.

Antiphospholipid syndrome. Also known as sticky blood syndrome or Hughes syndrome, this is an autoimmune or genetic condition that increases a woman’s risk of forming blood clots in her legs or lungs.

Thrombophilia. This inherited condition which makes your blood more likely to clot may also cause late miscarriage.

Food poisoning. Avoid unpasteurised dairy products, raw or undercooked meat and raw or partly cooked eggs.

Pre-eclampsia. This occurs when a woman develops hypertension, excessive protein in the urine or excessive swelling. Though it typically occurs during the 3rd trimester in first-time mums, some may get it during the 2nd trimester.
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