http://www.airasia.com/site/ch/page.jsp?reference=airasiatnc (Chinese) English: Pregnant Passengers: It is the duty of pregnant passengers to advise us of the progress of their pregnancy at the point of booking of Seat and at the check-in counter. Our carriage of pregnant passengers are subject to the following conditions: * Pregnancy up to 27 weeks (inclusive): we will accept without a doctor's certificate subject to the passenger signing a Limited Liability Statement. * Pregnancy between 28 weeks to 34 weeks (inclusive): passenger shall produce a doctor's certificate confirming the number of weeks of pregnancy and that she is fit to travel which certificate shall have been issued not more than seven (7) days before the scheduled flight departure date. The passenger will be required to sign a Limited Liability Statement. * Pregnancy 35 weeks and above: we will refuse carriage.

请问AirAsia在怀孕几个月才不给孕妇上飞机呢？谢谢！