You're smart to ask — those "natural" supplements aren't automatically safe for baby... and won't necessarily help you out. Here's what's safe, what isn't, and what's currently caught in controversy.
_Alfalfa : Full of vitamin K, which helps blood clotting.
Chamomile : Can help ease nausea (always a plus!) and is a natural anti-inflammatory.
Fish Oil : Contains omega-3 fatty acids, and can boost both baby's coordination and mom's mood.
Saw Palmetto : May cause hormonal activity, something you probably don't need more of.
Dong Quai: Found to be a uterine stimulant and has relaxant effects... need we say more?
Black/Blue Cohosh: Can induce labor in women who are not fully to term.
Feverfew : A great headache remedy, yes, but since it can cause allergic reactions pregnant women are advised to stay away.
_St. John's Wort: Some docs tout it as an alternative treatment for depression, but there's little research to say it's safe for baby.
Red Raspberry Leaf : Richin iron and can decrease nausea, protect against miscarriage and ease labor pains, but some say it isn't safe during the first trimester.