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Labor and delivery: Pain medications

Pros

Nitrous oxide can be used on and off or continuously during labor. You control the amount you use. You'll be able to walk during labor. If you become too drowsy, you won't be able to hold the mask to your face and you'll stop inhaling the anesthetic.

The effects quickly wear off when you take off the face mask. Nitrous oxide is believed to have little effect on the baby.