Transcript for Princess Kate suffers acute morning sickness in 3rd pregnancy
Thanks, Adrienne. We do want to move on to breaking royal news. I'm over here, princess Kate and prince William expesaying they're expecting their third child and Kate suffering from morning sickness. Good morning, Nick. Reporter: Good morning, Paula. Slightly unclear how far along Kate is. Maybe 8 to 12 weeks so we're looking at a new royal baby sometime in the spring. April or may. First came George. Then came Charlotte. And now a new baby will make three. We've had news that the queen is delighted with the news. We're told that Charles and the duchess are excited. Reporter: They're delighted with the news of a new heir on the way but, again, the duchess is suffering from acute morning sickness. Hyperemesis gravidarum which Kate suffered from during her first two pregnancies that causes nausea and sickness and can lead to severe dehydration. The duke and duchess have been open about wanting a large family talking about it during their engagement. In 2010. It's very important to me and, you know, I hope "Will & grace" be able to have a happy families ourselves. Obviously we want a family so we'll have to start thinking about that. Reporter: The duchess even joking about a new baby back in July when given a stuffed animal designed for newborns at a tech event in Poland. We'll just have to have more babies. Reporter: And will and Kate have proved to be hands-on royal parents who have delighted royal watchers recently appearing in pippa's wedding and traveling with their parents this summer on official visits to Poland and Germany. They like to travel with them. They're not just about having George and Charlotte in the nursery and being wheeled out. Reporter: The new little one will be fifth in line to the throne. Busy times for Kate and William. Prince George starts school on Thursday. They're going to have three kids under the age of 5 but, Paula, don't feel too sorry for them. They have a full time nanny. Good to hear that. Thanks very much, Nick and our senior medical contributor Dr. Jen Ashton joins us now. Good morning to you. Good morning. Okay, so that's quite the announcement but suffering from hyperemesis gravidarum. Also known as -- Hg. This affects at most, what, 2% of women. Can you tell us what it is. Possibly so it's often described as severe morning sickness on that spectrum of severity. I think that's very inaccurate from a medical standpoint. We're talking about the potential for severe malnutrition, electrolyte abnormality, sodium, potassium% and in some cases organ failure so really I think that hyperemesis gravidarum is severe morning sickness like hurricane Harvey was a little bit of rain. So that's quite an understatement. What are the specific symptoms that Kate's probably going through right now. You know, a lot of women have a little bit of nausea and vomiting. With hg you're talking about voluming that could be every hour or more than every hour and really doesn't stop at the end of the first trimester like most cases do. Then you're talking about the potential for severe weight loss, dehydration, low blood pressure, potentially organ failure. I mean this can take a woman from being just bed bound to being needed to be hospitalized. Shows how tough she is because she experienced this the last two pregnancies and decided to do it all over again but we know she's treated at kensington palace. What can be done to ease those symptoms. It depends on the severe weather and cons KENS to the pregnant mom. We're taking care of two lives so both have to be considered even in the first pry mess ter but treatment at some points can need IV hydration, there can be medications, typically we use some that work centrally in the brain and in the G.I. Tract and then we're talking about potentially some rest, some certain diets and alternative therapies and I have seen pregnant women need I.V. Or even tube feeds for knew trig and hydration. It it can be very, very serious. Sounds so serious and we know you have so much experience with this, especially deliverin over 1500 babies so if you are experiencing Sims from hg, advice from Dr. Ashton. It affects not just that pregnant woman but her spouse and the whole family so take it day by day. Thanks, Jen. Congrats to the royal family but
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