I ideally want a baby as soon as poss, but for many reasons not till September. So obviously that means the earliest said baby could be born would be September 2014. So I know that gestation takes 9 months, but how does that work exactly. Eg....I don't want to time it wrong and have a August due date. Would trying in December be too early? I ovulate around the 25 th of each month. Basically anyone who had a September baby, when did you conceive!