Can someone calculate my pregnancy due date my lmp is December 26 2007...so don't every 26 of the month i become a month is 26 weeks 5 or 6 months my calculation im 5 months now 6 18 then 6 on 6 26?

the simplest way to do this is to add 40 weeks from your last menstrual period. a normal pregnancy lasts 40 weeks, 280 days, or ten lunar months. there is always the possibility of been off by a few days.