Are you trying or pregnant? I have only ever heard that raspberry leaf tea softens your cervic so is good in late stages of pregnancy to help with labour..
Havent heard it helps with conception.
I dont think I would chance it incase it give uterus contractions
you have to be careful with plants & stuff its the same with aromatherapy oils there are quite alot you cant use in pregnancy.
Which for me is a bit of a problem as am studying it at the mo & doing my first IVF cycle..
Good luck x