Tag: Contraception failure

While the birth control pill is over 99% effective with perfect use, its real-world effectiveness drops to around 93% due to human error. This gap highlights the many factors that influence **what causes the pill to not work** as intended, from inconsistent timing to interactions with other medications and health conditions.

While emergency contraception pills can prevent over 95% of pregnancies when used correctly within five days, many people wonder: how common is it for the morning after pill to fail?. The risk of failure is influenced by factors like timing, the specific pill type, and the user's body weight.

According to the manufacturer, ellaOne is intended for emergency use only, not as a replacement for regular contraception. A single dose is designed to prevent pregnancy after one instance of unprotected sex, but what happens if another incident occurs shortly after, prompting the question: **Can I take ellaOne two days in a row?**. This guide explores the pharmacological and practical considerations of repeated dosing.

According to a 2023 study, missing two combination birth control pills doubles your chance of pregnancy compared to missing one. The precise risk, and what you should do, depends on the type of pill you take and where in your cycle you missed the doses.

With typical use, the birth control pill is about 93% effective, meaning about 7 in 100 users will become pregnant each year [1.7.1, 1.7.3]. Understanding **what will make birth control pills ineffective** is crucial for maximizing their efficacy.