The Duchess of Cambridge plans to give birth naturally rather than having a caesarean section.
The future monarch will be born in the private Lindo wing of St Mary's Hospital, Paddington, where the Duke of Cambridge was born. William hopes to be with his wife throughout the delivery.
However, the Duke does not plan to take any time off before the delivery, so he could be 480km away in Anglesey when the Duchess goes into labour.
St James' Palace insists that the Duke and Duchess have chosen not to know the sex of the baby beforehand.
Aides confirmed that Marcus Setchell, 69, the Queen's former gynaecologist, will deliver the baby, assisted by the Queen's gynaecologist Alan Farthing, 50.