@inbook{inbookbf1d8364, title = {Vaginal progesterone in the menopause: cyclical and constant combined regimens for new physiological options in hormone replacement therapy}, author = {Ziegler, D. de and Ferriani, Rui Alberto and Bulletti, C.}, year = {1999}, publisher = {Parthenon}, journal = {Reproductive Medicine : a millennium review} }