Are there herbs that can help with fertility?

I remember an older auntie at my workplace talking about this chinese fertility herb called the "dong quai" (hope i spelt that right). Apparently it is like a ginseng type herb that is said to help balance estrogen levels and improve the chances of embryo implantation thus helping you conceive better. Another herb that I can think of would be red clover. It does wonders for your estrogen levels and contains lots of good vitamins and minerals such as vitamin C, calcium, phosphorus, potassium, chromium, magnesium, thiamine and niacin.