What are the causes of a miscarriage?

A pregnancy consists of a gestational sac and an embryo. The embryo develops into a baby during normal pregnancy. A miscarriage is usually caused by an abnormality in the embryo. The embryo can no longer grow due to this abnormality and is rejected by the body. The cause is usually a chromosomal aberration that occurred during the fertilization. This chromosome aberration is rarely hereditary and usually there are no consequences for any subsequent pregnancies. A miscarriage can’t be caused by physical exertion. For example, making love, falling, cycling, horse riding or riding a motor bike cannot cause a miscarriage.