Chromosomal abnormalities (defective genetic make up of the embryo) is the most common cause of blighted ova. In this, a pregnancy
sac develops normally but the baby does not form.
Traditionally, doctors adviced patients to wait for three months after a miscarriage
before conceiving, mainly for psychological reasons and to get over the trauma. However, medically there is no reason why you can not conceive soon after a miscarriage if both you and your partner are ready for it. The chances of your having a normal, successful pregancy are more than 75%.