Why Do Miscarriages Happen?
The most common cause of pregnancy loss is a problem with the chromosomes that would make it impossible for the fetus to develop normally.
Other factors that could contribute to a miscarriage include:
-abnormal hormone levels in the mother, such as thyroid hormone
-uncontrolled diabetes-exposure to environmental and workplace hazards, such as radiation or toxic agents-certain infections
-incompetent cervix, or when the cervix begins to open (dilate) and thin (efface) before the pregnancy has reached term-certain medications,
-Certain behaviors also increase the risk of a miscarriage. Smoking, for example, puts nicotine and other chemicals into the bloodstream, causes the fetus to get less oxygen,and increases the chance of losing a pregnancy. Alcohol and illegal drugs can also lead to miscarriages.