The commonest identifiable cause of early miscarriage is an abnormality of the embryo. About 70% of these miscarriages are associated with chromosomal abnormalities which may derive from either parent during cell division; they may also arise spontaneously as an unexplained mutation during the period prior to implantation. If several early miscarriages of identical pattern occur, chromosomal testing would be indicated. Blighted ovum, also known as anembyronic pregnancy, however, is a different condition. In these cases the amniotic sac is found not to contain an embryo on ultrasound examination. It is not clear whether these pregnancies derive from failure of the inner cell mass to form an embryo during early development, or some catastrophe befalls the early embryo during development, following which it is reabsorbed by the body. It is estimated that between 10% and 15% of confirmed pregnancies end in miscarriage, and the most common time for it to occur is between 8 and 13 weeks. As your two events are not the same, it would not be unrealistic to try again and expect a normal outcome. There is no optimum time to leave before trying again if you are in good health.
Women’s Health Educator
Health Information Line, Women’s Health Queensland Wide
Women living in Queensland can also call our Health Information Line - a free information and referral service for Queensland women - on 3839 9988 or 1800 017 676 (toll free outside Brisbane).
Please note that all health information provided by Women’s Health Queensland Wide is subject to this disclaimer
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