Carnival Cruise Line
Pregnant Women: Prohibited to sail if she will enter the 24th week of pregnancy before or at any time during the cruise.
Infants: Minimum age for sailing is 12 months for trans-Atlantic, Hawaii and South American cruises and 6 months for all other cruises.
Royal Caribbean Cruise Line
Pregnant Women: Royal Caribbean International cannot accept guests who will have entered their 24th week of pregnancy at any point before or during the cruise or cruise tour.
Infants: Infants sailing on a cruise must be at least 6 months old as of the first day of the cruise/cruisetour. However, for trans-Atlantic, trans-Pacific, Hawaii, select South American cruises/cruisetours and other selected cruises/cruisetours, the infant (as of the first day of the cruise/cruisetour) must be at least 12 months old. For the purposes of this policy, any cruise that has 3 or more days consecutive at sea will require infants to be 12 months old on the first day of the cruise/CruiseTour.