TY - GEN AU - Alexander,H TI - [How high are the "normal" early embryonic losses, that is, preclinical and clinical abortions?] SN - 0044-4197 PY - 1989///0315 KW - Abortion, Spontaneous KW - epidemiology KW - Embryo Loss KW - Female KW - Fertility KW - Fetal Death KW - Humans KW - Pregnancy N1 - Publication Type: Letter ER -