They were also less likely to have an ectopic pregnancy, a cesarean or preterm delivery,
or a low-birth-weight infant. The highest risks of a second
miscarriage and other
pregnancy complications were seen among women who conceived more than 24 months after miscarriage. The findings run contrary to current guidelines by the World Health Organization to wait at least half a year to conceive after having a miscarriage, which affects approximately one in five pregnancies.