One herb that has been studied is black cohosh, which is sometimes known as black snakeroot, bugbane, or rattleroot. American Indians boiled the root and used it in connection with menstrual problems and childbirth.
Üheks läbiuuritud ravimtaimeks on lursslill (Cimicifuga racemosa), mille keedetud juurt on Ameerika indiaanlased kasutanud menstruatsioonihäirete puhul ja sünnitusabis.