What kind of herbal drink should pregnant women have?

I generally avoid any forms of herbs (especially medicinal herbs) when I was pregnant. Better to be safe than sorry. Certain herbs like ginseng can cause abnormal levels of hormones and may result in mutation of genes. However ginger and peppermint are known to ease nausea and should be able to consume in moderate amounts. http://sg.theasianparent.com/10-tips-to-cure-morning-sickness/