Fig. 3
From: Fetal sex determination in twin pregnancies using non-invasive prenatal testing

Fetal fraction correlation in twin pregnancies. a Correlation of fetal fraction estimation with the normalized frequencies of Y chromosome reads in twin pregnancies. Full lines and dashed lines represent the average and ±3*standard deviation (s.d.) of fetal fraction estimation, respectively. b Comparison of fetal fraction among the three different sex groups in DCDA twin pregnancies. FF female–female, FM female–male, MM male–male