Intracervical Balloon Placement With Nitrous Oxide Administration

Nitrous oxide, commonly known as laughing gas, is a colorless, non-flammable gas with a slightly sweet odor, used for its analgesic and anesthetic properties in medical and dental procedures to provide pain relief and sedation.

Oxygen is a colorless, odorless gas essential for human respiration and used medically to treat conditions resulting from low oxygen levels in the blood. In this trial Oxygen is being used as a placebo.