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Human Reproduction, Vol. 13, No. suppl_1, pp. 20-32, 1998
© 1998 European Society of Human Reproduction and Embryology

Principles of mammalian fertilization

W. Küpker1,3, K. Diedrich1 and R.G. Edwards2

1 Department of Obstetrics/Gynecology, Medical University Lübeck RatzeburgerAllee 160, 23538 Lübeck, Germany 2 Moor Barns Farmhouse Madingley Road, Coton, Cambridge CB3 7PG, UK

Correspondence: 3To whom correspondence should be addressed

The principles of mammalian fertilization are defined in relation to studies of the intracytoplasmic injection of spermatozoa into human oocytes (ICSI). Sections are included on the production of mature oocytes and mature spermatozoa, sperm–oocyte interaction, and formation of the pronucleate oocyte. Current concepts in gametogenesis are discussed, including spermiogenesis, oogenesis, the biology and penetration of the zona pellucida including capacitation and the acrosome reaction, gamete fusion, the block to polyspermy and growth of the pronucleus. A concluding section relates the normal events of fertilization to those occurring after ICSI and discusses various types of anomalies found in the oocyte after ICSI.

Key words: acrosome reaction/capacitation/fertilization/gametogenesis/ICSI


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