There's a lot of confusing, conflicting information on herbal tea/supplement use in pregnancy. eg. I've read that you shouldn't drink chamomile tea.

A friend recommended Natures Own Travel Well which is just a powdered ginger tablet for morning sickness there's 1000mg of it per tablet. The Blackmores m/s tablets contain 400mg of ginger plus some B6. And yet I have just googled ginger in pregnancy there are a few sources which say that, while it's been proven to be effective there haven't been any studies regarding safety. I even found one which said there had been an increased rate of miscarriage in rats on a ginger trial. Hmmmmm....