A miscarriage, often referred to as a “spontaneous abortion,” describes the loss of a pregnancy, usually occurring within the first 20 weeks. About 80 percent of all miscarriages happen before the completion of the first trimester. Research shows that 10 to 20 percent of women who know they are pregnant experience a miscarriage. This does not include the situation that 30 to 50 percent of fertilized eggs are lost before one gets pregnant which happens too early to even realize it.
9 Common Miscarriage Causes
The miscarriage causes are not always clear. The most common suppositions of a miscarriage that takes place within the first 12 weeks of pregnancy are hormonal issues, collagen vascular diseases (such as rheumatoid arthritis), infections, abnormalities in the chromosomes, etc. However, the majority of miscarriages have been attributed to chromosomal abnormalities within the fetus. Each of the miscarriage causes will be further discussed below.
1. Hormonal Problems
Hyperthyroidism, Cushing’s disease and polycystic ovary syndrome are all examples of hormonal issues that increase the possibility of miscarriage. Luteal phase defect which means there is not enough progesterone produced to sustain the fetus in the ovary is another possible miscarriage cause that is thought to result in losing a fetus, though the results of these studies are arguable.