Outcomes and Measures
The primary outcome was cumulative livebirth rate, defined as the birth rate of the first living neonate during the follow-up. Secondary outcome measures were time to first live birth, which was from the date of the first tubal surgery to the date of the first delivery of a live neonate; biochemical pregnancy, defined as a positive pregnancy test or serum HCG-level greater than 5 IU/L; clinical miscarriage, defined as a spontaneous pregnancy loss occurs after a confirmed intrauterine pregnancy (by ultrasound or by histology); ectopic pregnancy, defined as an embryo implanted outside the uterine cavity; and mode of conception, including natural conception or IVF. In case of live birth, we reported gestational age at delivery. Cumulative livebirth rate by natural conception was also calculated in the neosalpingostomy group.