Taking a pill once a month is more convenient than taking one once a day. New research introduces a monthly pill and tests it in pigs.

Researchers estimate that, with typical use, 9% of women in the United States who take the birth control pill become pregnant each year.

A person needs to take an oral contraceptive every day, and preferably at the same time of day, for the drug to be effective.

This consistency can be difficult to maintain, and it may make this form of birth control less attractive.

Now, a study appearing in Science Translational Medicine presents a new alternative: a birth control pill that a person only needs to take once a month.

The new, monthly pill releases the common contraceptive drug levonorgestrel gradually over the course of 4 weeks, explain the researchers.

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