Koopman-Esseboom, C.

study pregnancy outcome children birth death infant singleton health perinatal delivery centre ivf twins delay gestation mc twins netherland mortality weight 32 weeks department caesarean section ivf singletons embryo transfer embryo university hospital transfer perinatal mortality monochorionic result sample birth weight dc twins obstet strategy cohort complication health problems difference syndrome analysis health outcomes caesarean gynecol obstetric neurodevelopmental outcome morbidity reprod twin-twin transfusion syndrome section labour transfusion twin-to-twin transfusion syndrome data collection problem development cost-effectiveness incidence 37 weeks child embryo transfer strategies model number co-twin subscale neurodevelopmental utrecht preterm maastricht university table co-twin death status trial parent score collection det strategies information ultrasound