What will cause a miscarriage?

Many reasons: There are many reasons for a miscarriage but the most common one is that there is a problem with the chromosomes of the fetus. These are very common, have nothing to do with anything you are doing, and the miscarriage is natures way of preventing these abnormal pregnancies from continuing. If you don't have multiple miscarriages, then no testing is necessary.

Miscarriage: It is thought that most early miscarriages are caused by a one-off problem with the chromosomes of the developing baby (fetus) in the womb. Such genetic mistakes become more common when the mother is older - that is, over 35 years old. There is greater risk of having a miscarriage if you Smoke, drink too much alcohol, Use recreational drugs, have certain medical conditions or infections.