Here's what happens during each stage of labor – from how long each stage lasts to what you might feel. Labor happens in three stages — early labor and dilation, pushing and delivery, and finally, ...

When labor begins, the uterus must coordinate rhythmic, well-timed contractions to deliver the baby safely. While hormones such as progesterone and oxytocin are key contributors to that process, ...

If your contractions come regularly every 5 to 10 minutes, it's time to call your doctor. Watch for signs like your water breaking or bloody vaginal discharge, which indicate labor might be starting.

PIEZO1 transcripts in human uterine muscle at term. Green indicates smooth muscle fibers in the uterus, red marks PIEZO1 mRNA, and blue shows cell nuclei. LA JOLLA, CA—When labor begins, the uterus ...