Well, when I do RPs involving pregnancy, I usually skip ahead a month or two of the persons pregnancy once I find a good time to do so, which the time periods I use are these:
Day 1: obviously the day they get pregnant
six weeks: pregnancy symptoms set in(cramping, morning sickness, ect.) and person in the thread get the baby checked.
month 2: cravings of the person set in and find out the gender(although realistically its too hard to find out what the gender is, but oh well
)
Uhh...one sec...