Conclusions
This study demonstrates that gestational age of 1stshort cervix, and CL of 1st short cervix, as well as
other factors are predictors of overall PTB < 37 weeks and PTB
< 34 weeks among patients with a short cervix. In addition, we
have established nomogram that can help obstetricians to identify
patients at risk of PTB. A combination of this prediction model and
transvaginal ultrasonography may be efficient for clinical screening of
short cervix