How do I know if it worked?

How effective is taking the ellaOne® morning after pill?

If you need to take the ellaOne® morning after pill, you must take it as soon as possible and within five days of having unprotected sex. You will know ellaOne® has worked when your next period starts.

After taking ellaOne®, most women have a normal period at the expected time. But some may have their period later or earlier than normal.

Taking a pregnancy test

If you have had unprotected sex, take a pregnancy test if you experience any of the following:

  • Your period is more than 7 days late
  • Your period is unusually light or unusually heavy
  • You have symptoms such as abdominal pain, nausea, vomiting or breast pain
  • You have any doubt about being pregnant, do a pregnancy test

Pregnancy tests can be purchased at your local pharmacy, just like ellaOne®.

Pregnant after ellaOne®?

If you have accidentally taken ellaOne® during pregnancy, or have become pregnant despite having taken ellaOne®, HRA Pharma (the manufacturer of ellaOne®) is interested in receiving more information about your pregnancy. Information is anonymous to preserve your confidentiality. You can report information at, or ask your healthcare professional to do it for you. You are strongly advised to contact your healthcare professional as early as possible if you become pregnant.