Definitions
Couples failing to achieve pregnancy after a year of trying.
When a pregnancy locates in an abnormal site or tissue, such as the fallopian tube, rather than the uterine cavity.
The loss of a pregnancy before 20 weeks gestation.
The loss of a pregnancy at least 20 weeks gestation or at least 400 grams birth weight.
The death of a baby in the uterus before it is born.
The passing of a liveborn infant within the first 28 days of life.
The birth of a baby less than 37 weeks gestation.