Prince William and Kate will wait until the arrival of their baby to discover the gender.
The Duke and Duchess of Cambridge did not ask if they would be welcoming a son or daughter during routine scans, deciding to be surprised as with the their previous pregnancies.
The couple are said to be hugely grateful for the warm wishes they have received from members of the public in the UK and across the globe since Kate's pregnancy announcement last year.
There has been speculation that Kate could choose a home birth, however when she goes into labour she will again be cared for in the private Lindo Wing of St Mary's Hospital, where Prince George and Princess Charlotte were born.
Just like her previous pregnancies, it is likely she will have a team of more than 20 top medical experts and other staff working or on standby from Imperial College Healthcare NHS Trust, which runs St Mary's.
Consultant obstetrician Guy Thorpe-Beeston and consultant gynaecologist Alan Farthing will be among the team, two senior medics who were involved the delivery of the couple's other children.
Farthing, the Queen's surgeon gynaecologist, was a pioneer in keyhole surgery and today specialises in using the technique to treat gynaecological cancer patients.
Thorpe-Beeston, surgeon-gynaecologist to the royal household, delivered Charlotte in 2015.
The baby is expected this month and although a due date has not been revealed it is believed the birth is likely to take place during the second half of April.
Preparations for media coverage of the birth began today (April 9), with crowd barriers going up in the street opposite the Lindo Wing in Paddington, central London, and parking restrictions coming into force in the area.
Bookies believe Kate will have a girl and a large number of punters have placed bets on the baby being named Mary, the favourite with firms including William Hill and Coral.
Kate is likely to take an extended period off to recover and nurse the latest addition to her family but is expected to attend Prince Harry and Meghan Markle's wedding on May 19.