Meiosis, Germ Cells, and Fertilization
Meiosis, Germ Cells, and Fertilization
Meiosis, Germ Cells, and Fertilization
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IVF <strong>and</strong> ICSI Have Revolutionized the<br />
Treatment of Human Infertility<br />
• in vitro fertilization (IVF) 1978<br />
– multiple pregnancies occur in over 30% of cases<br />
– compared with about 2% in unassisted pregnancies.<br />
• intracytoplasmic sperm injection (ICSI) 1992<br />
– an egg is fertilized by injecting a single sperm into it<br />
– ICSI has a success rate of better than 50%
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