HANK MORGAN / SCIENCE PHOTO LIBRARY HANK MORGAN / SCIENCE PHOTO LIBRARY
In vitro fertilisation (IVF). Dr Georgeanna Jones, director of the Jones Institute in Norfolk, Virginia, holding a test tube containing human eggs removed for IVF. Fertility drugs are given to potential mothers to stimulate the production of several ova, rather than the usual one. These are then harvested, usually by laparoscopy, and are fertilised in a petri dish, using a fresh or frozen sample of the husband's sperm. If fertilis- ation is successful, the embryos are incubated and then transferred back into the woman's uterus via a catheter inserted through the cervix.
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