MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY
ICSI in vitro fertilisation. Computer illustrations showing a human egg cell (ovum, large, round) being fertilised with a sperm cell (spermatozoon, small white) through the process of intracytoplasmic sperm injection (ICSI). ICSI is an in vitro fertilisation (IVF) procedure in which a single sperm is injected directly into an egg using a microinjector hermetic syringe (long, right). At left, a micromanipulator is being used to support the egg during the injection process.
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