Up to 70% of women experience some degree of nausea during pregnancy, particularly during the first fifteen weeks.
It may be mild and not particularly troublesome apart from spoiling your appetite.
At the other extreme it can be bad enough to keep you lying down all day.
If it nausea and the accompanying vomiting are severe they may cause dehydration and this, if left unchecked could be serious.
If you are vomiting constantly and unable to keep anything down, or if your urine is dark or you get dizzy spells, then you must see your doctor.
Usually though, nausea during pregnancy is more of an inconvenience and a cause of disruption to your daily lifestyle than a serious condition.
The nausea and vomiting can be reduced by a number of measures, some of which work for some but not for others.
The following 7 pregnancy nausea remedies and tips may be helpful:

• Have a snack before bedtime to try to keep blood sugar levels up during the night time.
  Low blood sugar levels are thought to be one reason why nausea can be worse in the morning after not having eaten for many hours.
  Nuts or a protein bar and a glass of milk would be ideal.
  
• Eat small meals every 2-3 hours during the day even if you are not hungry.
  This can help to avoid your blood sugar levels dropping too low which may trigger an attack of nausea.
  Have high protein snacks handy such as nuts and cheese, and eat plenty of fruit and vegetables.
  
• When you first wake up of a morning try to eat a dry biscuit or some such so as to raise your blood sugar levels before you think about getting up.
  Then, when you get up, take it slowly as sudden or fast changes in position can bring on nausea.
  
• Drink plenty of fluid through the day.
  Plain water is best but some fruit juice is OK.
  Try to avoid caffeinated drinks such as tea and coffee.
  Herbal tea can be a good thing though, especially one containing ginger.
  Ginger ale is a traditional remedy for nausea that can help - it is best to let some of the fizz out first.
  
• Get plenty of rest during the day as well as a good night's sleep if you can.
  The more tired you are, the more you are likely to suffer sickness.
  
• Avoid food and smells that make you feel sick.
  It's likely that the smells of food cooking can be very off-putting so you need to avoid these even if it means you eating cold foods for a while.
  Your tastes change during pregnancy too and you may find you develop a taste for salty or vinegary foods.
  
• You might find an anti-nausea wrist band will help alleviate feelings of sickness.
  These are fabric bands, worn like a bracelet, but with a plastic stud that you position over the pulse point on the inside of your wrist The idea is that this puts pressure on an acupuncture point to relieve symptoms.
  

The general advice above should help get you through the first two or three difficult months of pregnancy when nausea and vomiting can be a real problem.
If you find that you still experience extreme nausea and vomiting then do consult your doctor as it may be possible for him to prescribe an anti-emetic drug that is safe for you to take during pregnancy.