One of the most difficult problems that a fertility specialist has to deal with is that of recurrent miscarriage. That term defines the loss of at least three clinically confirmed and scan-detectable pregnancies. Fortunately, the frequency of six miscarriages does not exceed 4% in the general population.
These miscarriages are distinguished into primary and secondary. Primary are the miscarriages that involve pregnancies with the same partner without any of them or any other having exceeded 24 weeks of pregnancy and secondary are those miscarriages that occur after a pregnancy that has lasted more than 24 weeks. Secondary miscarriages are less common than primary and the investigation of the causes will only lead to an obvious pathogen finding in only 20-25% of the cases.
