1
Multiparous and nulliparous women, with uncomplicated singleton pregnancies, were enrolled during the third trimester of pregnancy.
2
The target population is Chinese women with an uncomplicated singleton pregnancy at gestational age of 37 to 42 weeks.
3
Methods: In 85 women with uncomplicated singleton pregnancies, three transvaginal ultrasound examinations between 11+0 and 13+6 weeks' gestation were performed.