Ginger may support women who experience pregnancy sickness. A 2016 review reported that ginger may stop vomiting for one in three women, or improve nausea and vomiting during the first trimester.
7 However, it is unlikely to help with the symptoms of the more serious hyperemesis gravidarum, which causes persistent vomiting resulting in weight loss, dehydration and electrolyte imbalance; it is a leading cause of hospital admissions during early pregnancy. Despite some trials historically suggesting ginger is better than placebo for hyperemesis gravidarum (HG), these trials had various flaws and more recent research has shown that for around 50% of women with HG ginger actually made symptoms worse, increased acid reflux and caused pain on vomiting.
Most striking, was that woman with HG reported that people suggesting ginger as a remedy had a negative emotional effect on them. HG is a serious and potentially life-threatening medical condition and suggesting ginger as a treatment was reported to de-validate or belittle their experience and undermine the seriousness of their illness.
Check with your GP before taking ginger supplements, as they may not be suitable for everyone. There is some evidence that ginger taken as a supplement may affect the way blood clots so patients who have conditions such as thrombocytopenia, are on some cancer treatments or who are at increased risk of bleeding, should avoid high doses of ginger.