Contractions become regular and progressively closer together. They follow a predictable pattern (e.g., every 5-10 minutes).
Irregular timing with no consistent pattern. May stop and start randomly.
Steadily increase in strength and intensity over time. Each contraction may be stronger than the last.
Stay about the same strength or vary unpredictably. Don't get progressively stronger.
Start in the lower back and radiate to the front of the abdomen. May feel like intense menstrual cramps.
Usually felt only in the front of the abdomen. May feel like tightening or hardening.
Continue regardless of position changes, rest, or hydration. Nothing stops them.
Often stop or lessen when you change position, rest, or drink water.