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    when does morning sickness start

    Morning sickness usually starts when you're five weeks or six weeks pregnant. Some women may start to feel queasy as early as four weeks. If you don’t feel queasy in the early weeks, you may miss morning sickness altogether. 

    Morning sickness can start as soon as you wake up. But although it's called morning sickness, nausea can strike at any time of the day or night. 
    Certain smells may set off your nausea. Tiredness can also leave you feeling sick, so you may feel worse later in the day. Things that made you feel sick before you became pregnant may feel more nauseating now. 

    The sickness you feel is thought to be connected to the hormones human chorionic gonadotrophin (hCG) and oestrogen. These hormones are produced by your body in large quantities until the placenta has grown enough to take over nourishing your baby.

    Pregnancy hormones are likely to be higher, and sickness worse as a result, if you're expecting a girl, or twins or triplets

    If your morning sickness is severe, you may feel very sick and be vomiting often. The most severe form of morning sickness is hyperemesis gravidarum (HG), which means excessive vomiting during pregnancy. 

    If you can't eat or drink anything without being sick, and are vomiting many times a day, you may have HG. HG can cause dehydration and weight loss, so ask for help from your doctor as soon as possible.

    Coping with morning sickness can be hard. It can make it difficult for you to work, do shopping, or look after your family. It can also be upsetting to be so unwell when you feel you should be happy.

    Although morning sickness can make you feel miserable, it is a good sign. It means that the levels of hormones in your body are high, protecting your pregnancy. Rest assured that you should be through the worst by week 16. 

    Don't worry if you don't feel sick at all – that's fine too, and it just means you've escaped an unpleasant pregnancy side-effect!