What would you consider the #1 herb for pregnancy?

[Dot-to-Dot]

Besides Red Raspberry Leaf and Nettle.  (sorry, I know RRL is probably a popular answer).  I am trying to check out at Mountain Rose Herbs and there's that $10.00 minumum.  I've already got RRL, nettles and hibiscus...but what else should I add to my cart in order to make a wonderful herbal pregnancy tea???

I happen to be 25wks along, I have VERY, very low blood pressure, no swelling at all, tend to have large babies, a weak pelvic floor, probably low in iron and I bled more than I expected last time (despite having been drinking RRL/nettle tea throughout last half of pregnancy).  I don't know if any of those tidbits matter or would influence your opinion about the perfect herb, but I figured I'd just add it in anyway.

[DanielleT]

I add alfalfa as well 

[IdentityCrisisMama]

I may add a bit of spearmint for flavor and maybe get some comfery (not to drink) to make some lovely postpartum frozen pads. I've also heard of women taking oat straw.  

[SGVaughn]

Id probably go with alfalfa as well given your belief you might be anemic and a potential propensity for heavy bleeding

for me its dandelion for swelling...I swell like crazy during pregnancy