In clinical trials, a new male birth control gel seems to adequately reduce sperm count without decreasing libido — though, importantly, it remains to be seen whether it actually prevents pregnancy., the phase 2 trials of the new gel, which contains testosterone and a synthetic hormone called Nesterone that's already found in the Nuvaring vaginal birth control ring, will require committed monogamous couples to use the experimental treatment as their only contraceptive for a full year.
The California resident said that besides a bit of acne and weight gain — which could have come from switching to a job where he doesn't move around much — he experienced almost no side effects. Should the Food and Drug Administration approve the contraceptive gel after phase 2 trials, Whitehead said he planned to keep using it, especially given that his partner had struggled with side effects from female birth control options.
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