Royal Caribbean International has a strict safety policy regarding pregnancy: they cannot accept guests who will have entered their 24th week of pregnancy at any point during the cruise or "CruiseTour." This means that if you reach exactly 23 weeks and 1 day at any time while the ship is at sea, you will be denied boarding. This policy is strictly enforced because cruise ships are not equipped with neonatal intensive care units or specialized obstetricians to handle premature births or pregnancy-related emergencies. All guests are typically required to fill out a health questionnaire at the pier attesting to their pregnancy status. If you are pregnant but will be under the 23-week limit for the entire duration of the sailing, it is highly recommended (though not always required) to carry a doctor’s "Fit to Travel" letter stating your expected due date and confirming that your pregnancy is not high-risk. If you find yourself over the limit after booking, you should contact the cruise line immediately to discuss cancellation or rescheduling options.