It is not possible to book tickets for an unborn child. Please wait until the baby is born and has its own passport before making the reservation. Future names for babies are not accepted. We cannot guarantee that babies that have not been booked at the same time as other passengers will be permitted to fly, even if they are going to sit on an adult's lap.
This depends on the airline's availability and technical capabilities, which are outside our control. It may not be possible to change or correct the name/date of birth of an existing booking.