Delayed Period After Taking Emergency Contraceptive: What to Expect

Taking emergency contraception can cause a delay in your menstrual period?

The woman had her menstrual period from May 12 to May 17 last month.
She had sexual intercourse on June 7, using a condom, but it slipped off during the act.
She did not feel any ejaculation.
The next day, she took an emergency contraceptive pill (within 72 hours, one tablet).
I would like to know when her next period is expected, as it is currently 6 days late from the scheduled time.
Additionally, she has been experiencing abdominal pain and breast tenderness for 3-5 days after taking the emergency contraceptive, and on the 6th day, she feels like her period is about to start.
Could you please provide clarification on this matter?

Aike, 20~29 year old female. Ask Date: 2019/06/15

Dr. Huang Jianzhong reply Obstetrics and Gynecology

The woman had her menstrual period from May 12 to May 17 last month.
She had sexual intercourse on June 7, using a condom, but it slipped off during the act.
She did not feel any ejaculation.
The next day, she took an emergency contraceptive pill (within 72 hours, one tablet).
I would like to know when her next menstrual period is expected, as it is currently 6 days late.
Additionally, the woman has been experiencing abdominal pain and breast tenderness for 3-5 days after taking the emergency contraceptive, and on the 6th day, she feels like her period is about to start.
Answer: It is advisable to take a pregnancy test.

Reply Date: 2019/06/15

More Info

When it comes to emergency contraception, understanding the potential effects on the menstrual cycle is crucial. In your case, you had unprotected intercourse on June 7th, after which you took an emergency contraceptive pill (ECP) within 72 hours. This is a common scenario where individuals seek clarity on what to expect regarding their menstrual cycle following the use of ECPs.

Emergency contraceptive pills, such as those containing levonorgestrel or ulipristal acetate, can cause temporary changes in your menstrual cycle. These changes can include alterations in the timing of your next period, as well as symptoms such as abdominal pain, breast tenderness, and mood swings. These side effects are generally due to the hormonal changes induced by the ECP.

In your situation, you mentioned that your last menstrual period started on May 12th and ended on May 17th. If your cycle is typically regular, you would expect your next period around June 12th to June 17th. However, since you are now six days late, it is important to consider a few factors:
1. Timing of the ECP: ECPs can delay ovulation, which may result in a delayed period. The hormonal content in these pills can disrupt your normal cycle, leading to a later onset of menstruation.

2. Symptoms: The abdominal pain and breast tenderness you are experiencing are common side effects of ECPs. These symptoms can mimic premenstrual syndrome (PMS) and may indicate that your period is approaching.

3. Pregnancy Test: Given that your period is late, it is advisable to take a home pregnancy test. ECPs are not 100% effective, and while the risk of pregnancy is reduced, it is still possible. A pregnancy test can provide clarity on whether or not you are pregnant.

4. Follow-Up: If your period does not arrive within a week or if you continue to experience unusual symptoms, it would be wise to consult with a healthcare provider. They can offer further evaluation and guidance.

In summary, after taking an emergency contraceptive, it is not uncommon for your next period to be delayed. The symptoms you are experiencing may indicate that your period is on its way, but a pregnancy test is a prudent step to rule out pregnancy. If you have any concerns or if your symptoms persist, seeking medical advice is always a good practice.

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