What are the chances of having a second blighted pregnancy?

30%: The rate of miscarriage varies depending on what studies you are reading, but the chance of another miscarriage after 1 is the same as it was before your first one: about 30%.

Not uncommon : It is common for a woman to have a pregnancy loss or spontaneous abortion. The concept of the "blighted ovum" is a lay term that suggests the pregnancy has occurred, but no obvious evidence of a pregnancy is identified within the uterine cavity. It does not reflect an ectopic pregnancy. Perhaps 20% of known pregnancies are lost. "anembryonic" pregnancies perhaps are 1/4 of these or 5% overall.