RICHARD G. RAWLINS, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY RICHARD G. RAWLINS, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
In vitro fertilisation. Light micrograph of a human spermatozoan (sperm) being injected into an egg during in vitro fertilisation (IVF). The round egg cell (centre) is being injected with a microneedle (at right). The egg is held in place by the tip of a pipette (far left). This is known as the ICSI (intracytoplasmic sperm injection) technique. In vitro fertilisation is a technique for artificially fertilising an egg. It is conducted when a couple cannot conceive naturally. After fertilisation, usually several fertilised eggs are introduced into the uterus (womb), as the rate of early miscarriage is high.
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