Premier Research

This study tested a new contraceptive vaginal ring that releases two hormones (Nestorone and estradiol) to prevent pregnancy. About 385 healthy women aged 18-35 took part to see how well the ring works and how it affects their monthly bleeding patterns. The ring was used either c…

This early-stage study tested a single dose of a new male hormone pill (11β-MNTDC) in 12 healthy men to see if it is safe and how the body handles it. The goal is to develop a daily birth control pill for men. The study focused on safety and side effects, not yet on how well it p…

This study tested a new vaginal ring that releases hormones to prevent pregnancy. About 1,200 healthy women used the ring for one year. Researchers measured how well it worked and checked for side effects.

This study tested two different doses of a contraceptive patch that releases the hormone levonorgestrel through the skin. About 120 healthy women aged 18-44 took part to see how well the patch prevents pregnancy, how safe it is, and how it affects cervical mucus and ovulation. Th…

This study looked at how safe and effective an experimental female condom is at preventing pregnancy and sexually transmitted infections. About 500 healthy women aged 18 to 40 used the condom as their main birth control for up to 7 months. Researchers tracked pregnancy rates, inf…

This study tested whether a daily oral pill (DMAU), taken alone or with another hormone (LNG), can safely and temporarily lower sperm count in healthy men to prevent pregnancy. 92 men took the pill or a placebo for 12 weeks. The goal was to see if sperm counts dropped below a lev…