AG2P1  to female has a history of previous preterm birth at 32 weeks. The percentage chances of preterm birth in this pregnancy are:
Preterm labour is defined as spontaneous expulsion of the products of conception after viability and before 37 completed weeks.
Prior preterm birth is a very good predictor of subsequent preterm labour. There is a three-fold increase in risk for these women
15%
5%
10%
25%