Series of overviews on miscarriage and recurrent miscarriage.

Miscarriage is a relatively common occurrence with many knowns and unknowns and a profound psychological impact on individuals and couples. The editors felt it was time to publish a series of overviews for Views and Reviews on both sporadic miscarriage and recurrent miscarriage. The series starts with the prevalence of miscarriage and recurrent miscarriage and subsequently describes the psychological impact, what we know of the genetics, whether uterine natural killer cells may play a role, the association with infections, and potential interventions.