Scientists believe they are one step closer to developing an effective male contraceptive jab after successfully carrying out the largest feasibility study to date.
Researchers at the National Research for Family Planning in Beijing injected 1,000 healthy, fertile male patients with a testosterone-based jab over a two-year period and found only 1 per cent went on to father a child. The men were all aged between 20 and 45 and had fathered at least one child in the two years before the testing began. They were also all involved with healthy female partners between the ages of 18 and 38 who had no reproductive problems of their own.
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