After 37 weeks, call 911 or other emergency services immediately if you:
Have had fluid gushing or leaking from your vagina (the amniotic sac has ruptured) AND you know or think the umbilical cord is bulging into your vagina (cord prolapse). If this happens, immediately get down on your knees so your buttocks are higher than your head to decrease pressure on the cord until help arrives. Cord prolapse can cut off the fetus's blood supply. (These measures apply to you if you are as early as 24 weeks pregnant.)
After 37 weeks of pregnancy, call your doctor or midwife immediately or go the hospital if you:
Have vaginal bleeding (for light spotting, you can call at any time on the same day).
Have had regular contractions for an hour. This means about 4 or more in 20 minutes, or about 8 or more within 1 hour.
Have a sudden release of fluid from the vagina.
Notice that the baby has stopped moving or is moving much less than normal. See Pregnancy: Kick Counts for information on how to check your baby's activity.