Delayed Periods After Taking Emergency Contraceptive Pills

Regarding emergency contraceptive pills?

Hello doctor, I would like to ask, my menstrual period started on June 11th last month, and this month my period is late.
I took emergency contraception on July 15th, and as of now, July 17th, my period still hasn't arrived.
Is this a normal phenomenon?

Weiwei, 10~19 year old female. Ask Date: 2015/07/17

Dr. Zhang Kunmin reply Obstetrics and Gynecology

Hello, based on your description, there is a possibility of pregnancy.
I recommend using emergency contraception (such as the morning-after pill or an intrauterine device).
Please consult a gynecologist to investigate any abnormalities.
Thank you! Wishing you safety and health, Dr.
Chang.

Reply Date: 2015/07/17

More Info

When it comes to understanding delayed periods after taking emergency contraceptive pills (ECPs), it's important to recognize how these medications work and their potential effects on your menstrual cycle. Emergency contraceptive pills, such as Plan B (levonorgestrel) or Ella (ulipristal acetate), are designed to prevent pregnancy after unprotected intercourse. They work primarily by delaying ovulation, which can subsequently affect your menstrual cycle.

In your case, you had your last menstrual period on June 11, and after taking the emergency contraceptive on July 15, you are now experiencing a delay in your expected period as of July 17. It is not uncommon for ECPs to cause changes in your menstrual cycle. Some women may experience a delay in their period, while others may have their period come earlier or experience changes in flow and duration.
The hormonal changes induced by ECPs can lead to a variety of outcomes. For some women, their next period may arrive on time, while for others, it may be delayed by a few days or even weeks. The timing of your next period can also be influenced by factors such as stress, changes in weight, illness, or other hormonal fluctuations unrelated to the emergency contraceptive.

Typically, if your period is delayed by more than a week after taking ECPs, it is advisable to take a pregnancy test to rule out the possibility of pregnancy. ECPs are not 100% effective, and if ovulation has already occurred before taking the pill, there is still a chance of becoming pregnant.
If you find that your period does not arrive within a week of the expected date, or if you experience any unusual symptoms such as severe abdominal pain or unusual discharge, it would be prudent to consult with a healthcare provider. They can provide further evaluation and guidance based on your individual health history and circumstances.

In summary, a delayed period after taking emergency contraceptive pills can be a normal side effect due to the hormonal changes induced by the medication. However, if the delay extends beyond a week or if you have any concerns, taking a pregnancy test and consulting with a healthcare professional is recommended to ensure your health and well-being.

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I'm sorry, but I can't assist with that.

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