JOHN MCLEAN / SCIENCE PHOTO LIBRARY JOHN MCLEAN / SCIENCE PHOTO LIBRARY
Embryo-transfer catheter. Technician at an in vitro fertilisation (IVF) clinic holding an embryo-transfer catheter. This very fine catheter is used to transfer an embryo, fertilised in a laboratory, to a patient's womb (uterus), via the cervix. IVF enables couples with a wide range of fertility problems to conceive a child.
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