Nausea during pregnancy (referred to as morning sickness), is triggered by the hormonal and physical changes taking place in a woman's pregnant body. It can occur at any time of day but usually tapers off by the 2nd trimester. However, the intensity of the nausea varies from every individual, and some pregnant women will feel nausea throughout the entire pregnancy. Morning sickness is not harmful. However, if you have trouble keeping food down at all, or the morning sickness comes with fever and weight loss, you should consult your doctor already, to rule out any further complications. For mild nausea, you could talk to your doctor about taking supplements for nausea such as vitamin B6. To prevent aggravating the condition, you should not skip meals and also avoid spicy foods. Most importantly, you should ensure you drink plenty of liquids too to prevent dehydration.