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Mettler, L., Riedel, H.H., Bonhoff, A. et al. Multiple pregnancies in gonadotropin-stimulated cycles after human in vitro fertilization (IVF) and embryo replacement. Experientia 41, 1509–1514 (1985). https://doi.org/10.1007/BF01964785
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DOI: https://doi.org/10.1007/BF01964785