Study population
A total of 237 twin pregnancies who had normal NIPT results and delivered ≥28 weeks were included in study period. 5 cases of intrauterine death of one fetus, 8 structural abnormality in one or both foetuses were excluded from this study. The proportions of DC and MC twins were 77.6% (174) and 22.3% (50) respectively. Compared to MC group, DC group had higher maternal age (p =0.006), longer gestational weeks at delivery (p <0.001), larger birth weight of the foetuses (p =0.001) and higher percentage of pregnancies conceived by Assisted Reproductive Technology (p <0.001). The incidence of preterm delivery was higher in MC group (p =0.004). There was no difference in other pregnancy complications such as gestational hypertension, gestational diabetes or thyroid diseases. (Table 1).