Cost to the user is one factor preventing many US women from using more effective contraceptives.

Now she also wants a more effective contraceptive.

But they frequently lack access to or are suspicious of the most effective contraceptives.

This vaccine is currently being tested in animals and hopefully will be an effective contraceptive for humans.

In 98.6 percent of the men, the injections were an effective contraceptive.

I am also calling for family planning, including access to effective contraceptives and safe abortions.

After 3 months since your last injection, this form of birth control can no longer be guaranteed as an effective contraceptive.