Yes. Children must be older than six weeks to fly on military aircraft. If the infant is younger than six weeks old, there must be written permission from a physician to fly for mother and child. Pregnant women may fly without approval until their 34th week of pregnancy. In a medical emergency, a pregnant woman of more than 34 weeks or a child younger than six weeks and the mother will be flown on a medical evacuation (MEDEVAC) flight as patients.