TY - GEN AU - RYDEN,A B V TI - The effectiveness of natural and synthetic oestrogenic substances in women SN - 0001-5598 PY - 2004///0215 KW - Contraceptive Agents, Female KW - Estradiol Congeners KW - Estrogens KW - Female KW - Humans N1 - Publication Type: Journal Article UR - https://doi.org/10.1530/acta.0.0080175 ER -