Regulation may vary depending on each airline, but some airlines refuse to board a pregnant woman whose due date is within 4 weeks from the day of your returning flight.
If this will be the case, please consult your airline and physicians in advance.
Depending on airline, infants must be at least 6 weeks old and can be held by adult (a lap child) or use his/her own seat to place it in a reserved seat.
For detailed information, please contact your airline.
*Once a child has reached his/her second birthday, the child is required to have a purchased seat.