Morning sickness is a debilitating condition that the majority of pregnant women will experience at some point. But despite how widespread it is, why sickness in pregnancy happens has been somewhat of a mystery until now.

A new study has uncovered the hormone that triggers morning sickness. It takes us a step closer to developing a treatment for the condition and offers a ray of hope to the women who suffer with it during their pregnancies.

A cure for homesickness, on the other hand, is unlikely to be found any time soon. But if you're struggling with the prospect of being away from family this holiday season, there are things to help you deal with the challenge.

And one treatment most people in wintery Britain might consider taking is a regular vitamin D supplement. Research increasingly points to a number of potential health benefits beyond the well established bone health.

Siriol Griffiths

Wales Editor

We think we have found a cause of pregnancy sickness, and it may lead to a treatment

Sam Lockhart, University of Cambridge; Stephen O'Rahilly, University of Cambridge

New research has uncovered the hormone that triggers morning sickness, offering hope for millions of women.

How to deal with homesickness your first Christmas away from home

Nilufar Ahmed, University of Bristol

Homesickness will affect almost everyone at some point in their life.

Vitamin D supplements can keep bones strong – but they may also have other benefits to your health

Martin Hewison, University of Birmingham

In the UK, it’s recommended people aim to get at least 400IU of vitamin D a day.

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