‘She will be on medication, anti-sickness tablets, so it's important she takes them on time.’
'The emotional side is going to be really tough on her. It's just so unrelenting, you wake up thinking you've got a whole day to get through and this lasts for months'
Caitlin Dean, Pregnancy Sickness Support spokesman
Mrs Dean said William's support would also be important: ‘The emotional side is going to be really tough on her. It's just so unrelenting, you wake up thinking you've got a whole day to get through and this lasts for months.
‘William is going to be really key. My husband was my rock and, as hard as it was, it brought us closer together.’
The Duke is an RAF search and rescue helicopter pilot based at RAF Valley on Anglesey and is likely to get time off to help care for his wife but will have to return to work at some stage.
The Duchess's mother Carole and sister Pippa could step in to provide support for Kate when her husband is away.
TAKE IT EASY AND DRINK PLENTY OF FLUIDS: EXPERTS' ADVICE TO KATE
'HOW DO YOU KNOW I'M NOT A RADIO STATION?': CHARLES SHARES A JOKE
Prince Charles today said he was 'thrilled' at Kate's pregnancy, after the beaming Duchess of Cambridge left hospital following four days of treatment for acute morning sickness.
The Prince of Wales expressed his delight at the'marvellous' news and added: 'It's a very nice thought to become a grandfather in my old age.I'm very glad my daughter-in-law is getting better, thank goodness.'
The Prince also alluded to a prank call to the hospital by two Australian DJs on Tuesday morning that duped a nurse into revealing details about Kate's health, joking to reporters: 'How do you know I'm not a radio station?'
Kate was discharged from the King Edward VII Hospital in central London - where she smiled and told reporters she was 'feeling much better' -and headed to Kensington Palace to rest.
The 30-year-old emerged from the private hospital looking relaxed, carrying a bouquet of yellow flowers and giving a brief smile to the waiting press before being driven away with her husband Prince William.
Kate, who is less than 12 weeks pregnant, was wrapped up against the cold in a coat and scarf, and the royal couple will now spend time at their London home to allow for her to recuperate.
She was admitted on Monday after developing the condition of hyperemesis gravidarum, and was suffering from the effects of dehydration.
For medical staff to allow Kate to go home, her severe vomiting must be under control and they are likely to have given her anti-sickness medication.
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Smiling: Kate, 30, left the hospital with her husband Prince William as the furore over the hoax call that duped a nurse into revealing details about the Duchess's health continues
Looking out: Prince William and Kate are expecting their first child, and the Duchess of Cambridge was admitted to hospital suffering from a severe form of morning sickness in the early stages of her pregnancy