Red Raspberry Leaf is part of the subject of the main page article on Mothering's website today. Here's an excerpt:
"Red raspberry has been called the "herb supreme" for pregnancy. A wonderful tonic that helps to prepare the uterus for birth, relaxing and relieving cramps, it is so effective that many women actually report pain-free or virtually pain-free labors thanks to red raspberry leaf tea.
Red raspberry is rich in iron and calcium (which pregnant women need more of), potassium, and vitamins B, C, and E. It has been shown to help with morning sickness and postpartum depression, to prevent bleeding at birth and hemorrhaging, to return the uterus to normal more quickly after birth, and to encourage breast milk. British scientists have recently identified an active ingredient and confirmed raspberry leaf's use as a pregnancy tonic. It is safe and without side effects. Red raspberry leaves are usually infused as a tea and consumed three times a day."
By the way, Chamomile tea is safe during pregnancy as well -- don't deprive yourself!