Outcomes
Primary outcome of this study was the recurrent risk rate of PTB before
37 weeks of gestation. Secondary outcomes included the recurrent risk of
PTB < 24 and PTB <32 weeks. The recurrent risks are
reported for the total group as well as subdivided into prior sPTB
between 16+0-19+6,
20+0-23+6 and
24+0-27+6 weeks of gestation.