I'm 25weeks pregnant and having diarrhea three-4 times a day daily for past week. no contractions and not dehydrated. normal or cause for prelabor concern?

Probably ok, but..: Since you are not really having symptoms besides the few episodes of diarrhea, you should be ok with regard to the pregnancy. But, you have symptoms for a wk or more now, i would check out to see why. Maybe new foods? Meds? Recent antibiotic use? Recent travel? Use of well-water? (concern for giardia). So, consult your doc. Congrats on pregnancy. Good luck.