All about hyperemesis gravidarum (more than just morning sickness)

Sick of being sick? Some poor mums-to-be like Duchess Kate suffer so much from a severe form of morning sickness known as hyperemesis gravidarum that they are hospitalised.

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What is hyperemesis?
This is an extreme version of pregnancy nausea or sickness, officially known as hyperemesis gravidarum (HG). It is severe vomiting, usually in the first 20 weeks or so, where you can keep little or no food down.

The continuous nausea and vomiting indicative of HG can result in rapid and significant weight loss (more than 5 percent of prepregnancy weight), dehydration, electrolyte disturbances (imbalances in the vital salts that affect all bodily functions), ketosis and acetonuria (presence of ketones in the blood stream caused by lack of glucose in the blood).

These conditions often require hospitalisation to replenish liquids and treat malnutrition, and can lead to emotional exhaustion that leaves many women unable to care for themselves or their families.

What causes it?

To be honest we don't really know what causes HG, although there are lots of theories - including sensitivity to the pregnancy hormone HCG, or possibly thyroid problems. In a multiple pregnancy, more hormones are produced, which can lead to severe sickness, especially if you are already sensitive to them.

Is there any treatment?

Initially your midwife or GP will offer the usual advice for pregnancy sickness such as eating little and often, eating dry biscuits or toast when feeling sick, avoiding smells and food which makes you nauseous, wearing acupressure wristbands and resting as much as possible, as tiredness can often make sickness worse.

What if these treatments don't work?

If none of the above stops you from being sick you may become dehydrated, with a loss of skin tone, constant thirst, and concentrated urine - which is usually when admission to hospital is necessary. The treatment is to replace lost fluids with a drip containing sugar, water and minerals. You may also be given specific vitamins to take and be advised to rest as much as possible.

Are there any drugs to take for it?

The anti-emetic drugs used for pregnant women today are safe for you and your unborn baby. They're administered in hospital to break the cycle of trying to eat and drink then vomiting immediately afterwards.

Will it harm my baby?

Most studies show that being constantly sick won't harm the baby, except in very extreme cases. Studies have shown that severe cases of HG can lead to pre-term babies. For more information on HG and the risks involved visit the Hyperemesis Education & Research HER Foundation at www.helpher.org

Will it happen in subsequent pregnancies?

It can happen again, and is often more severe in subsequent pregnancies.

Read "Real-life: I had chronic morning sickness like Duchess Kate"

12:0AM, Dec 4th 2012

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