In vitro fertilization (IVF) is a multi-stage procedure which bypasses the mechanism of natural fertilization within the fallopian tubes of a woman. It attempts to achieve fusion of a sperm and an ...
ELECTRON microscopy has provided evidence for a series of anatomically distinct stages in the process of fertilization. In the polychaete worm Hydroides hexagonus, Colwin and Col win 1,2 have ...
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