Several promising male contraceptive products are currently making their way through clinical trials, Vox writes, including Nestorone®/Testosterone transdermal gel, a new topical gel that blocks sperm production.
Population Council researchers are working with the National Institute of Child Health and Human Development (NICHD) to develop this novel reversible contraceptive for men, which is designed to be applied daily and absorbed through the skin of a man’s shoulders or upper arms.
“In a 24-week study, published in 2012 and funded by the National Institute of Child Health and Human Development, the gel suppressed sperm levels in nearly 90 percent of men to 1 million per milliliter or less — the amount needed to prevent pregnancy — with few side effects.
Now a major, multicenter trial, involving 420 couples in the US, UK, Chile, Sweden, Kenya, and Italy, will start this summer, testing the effectiveness of the gel at preventing pregnancies. The male partner will start using the gel every day, and once his sperm count is low enough, the couple will rely on only the gel for contraception for 12 months.”