AG2P1 to female has a history of previous preterm birth at 32 weeks. The percentage chances of preterm birth in this pregnancy are:

Ans. is c, i.e. 15%Ref. Williams Obs 24/e, p 841Recurrent spontaneous preterm births according to prior outcomeBirth outcomeSecond birth (<34 weeks) (%)First birth >=35 weeks5First birth <=34 weeks16First and second birth <=34 weeks41