Technician sorting sperm for use in IVF

Technician sorting sperm for use in IVF


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Sperm selection. Technician counting types of human sperm for use in in vitro fertilisation (IVF). She is counting those sperm which are fast- moving (rapides), slow-moving (lents), moving only on the spot (sur place) and totally stationary (immobiles). This is done to gauge the health of a man's sperm. For IVF, only the healthiest sperm are selected. These are then introduced to the egg in a laboratory. If fertilisation is successful, the resulting embryo is implanted directly into the mother's uterus. Sperm can be stored cryogenically to preserve a man's sperm in cases of testicular cancer or other fertility- threatening diseases. Photographed in France.

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