How Late Can Plan B Make Your Period
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How Late Can Plan B Make Your Period
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Can Plan B make your period late or cause bleeding?
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Medically reviewed by Sally Chao, MD . Last updated on July 30, 2021.
Yes, Plan B ( levonorgestrel ) can delay your period or cause bleeding to occur outside of regular menstrual bleeding because levonorgestrel is a synthetic hormone. To prevent pregnancy, Plan B, like other birth control pills, must alter your hormone levels, which can prompt these menstrual changes. Plan B is associated with more menstrual changes than regular birth control pills because the dosage is higher.
In a clinical trial, 31% of participants experienced some change in their menstrual cycle after taking Plan B, but the potential menstrual changes are varied. Plan B may cause some women to experience heavier or lighter menstrual bleeding compared to their regular periods.
After taking Plan B, some women get their period sooner than expected, while others get it later. However, clinical trial data suggest most women will get their period within two days to one week of the anticipated time. Women who take Plan B and experience a delay in their period greater than one week are recommended to take a pregnancy test.
During your menstrual cycle, the time at which Plan B is taken can affect how your menstruation changes.
Nonmenstrual bleeding, or spotting, can also occur after using Plan B. Clinical trial data show that 16% of participants experienced spotting in the first week after taking Plan B. Similarly, in one study of 232 women who took Plan B, just under 15% experienced spotting. In this study group, the bleeding typically started around 4 days after Plan B was takenand lasted an average of 2.4 days, with a range of one to seven days. Some women began spotting as early as 8 hours after taking Plan B.
Menstrual changes and irregular bleeding associated with Plan B should go away without treatment. In one study of 132 women, most women returned to their normal cycle length in the next cycle following the use of Plan B. However, those who took Plan B later on in their cycle (after ovulation) had a slightly longer next cycle on average.
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Home » Blog » Reproductive Health » Sexual Health Care » Delayed Periods! How Late Can My Period Be After Taking Plan B?
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Simple Health Information For Women.
How late can a period be after taking the morning after pill? The morning after pill is not the most effective method to use if you want to prevent pregnancy after unplanned sex. BUT – it is easy to get hold of compared to the other methods (like the Copper coil) and therefore, its the most common option for many people.
But after using the pill, a lot of practical questions come to light.
For instance, how to know if the pill worked and can the morning after pill make you miss a period .
Others are: does the morning after pill affect your period , or issues around t he late period after morning after pill .
We will address these questions in detail in this post.
The EC pill is the method you reach for after having unplanned sex when you do not have protection. Protection means taking a regular contraception method like daily pills, implants, injections, or using a condom before sex.
Currently, after unprotected intercourse, we have two main methods for preventing an unplanned pregnancy – the emergency pills or the copper IUD.
The Copper IUD ( i ntra u terine d evice) or Copper coil is a small device that an experienced health provider fits inside your womb in the clinic.
It is the most effective emergency birth control method and needs to be fitted within five days of unplanned sex or five days of ovulation.
But if you can’t get the Copper coil, the emergency contraception pill is your next best bet.
EC pills come mainly in 3 different forms.
The emergency pills work by delaying ovulation, that is, the release of an egg from the ovary.
The pill changes your hormones to prevent the release of the egg, usually till sperm from sexual activity have died off.
Since we know that sperm can remain alive in the woman for 3-5 days, the hEC pill delays ovulation for 5 days after which you then ovulate.
If you do have sex again after the postponed ovulation happens, you could get pregnant despite the pill. Hence you must resume your regular contraception method straight away or use another emergency pill after sex.
If you take an emergency pill like Plan B, you will need to wait till your next period or do a pregnancy test to know if the pill worked.
The urine pregnancy test will not be positive till around 2-3 weeks after intercourse.
Your next period may come about the same time or be delayed by the pill.
In some women, it even comes earlier than usual.
Whether you rely on your period or a pregnancy test, you will need to wait a few weeks before you can tell if the pill worked or not.
So – are there any signs that Plan B didn’t work? No – there’s no way we can tell.
It would be best if you did not rely on spotting or breast soreness as signs the pill has worked or not without getting a test or speaking to your doctor.
However, there are ways you can boost the chance your pill works when you take it.
So you want to know how late can a period be without being pregnant. But can the emergency birth control pill delay your period? Yes.
The three potential effects of the pill on your period are:
The answer to this will depend on a few factors.
It is not easy to predict this, but based on the studies, we know that a small number of women taking the Ella pill have their menses more than seven days early.
20% of them had a period delay of about seven days .
In about four women out of 100, their period delay was more than 20 days. This delay happens more often when they take Ella early in their cycle (before ovulation).
For LNG pills like Plan B or Postinor, most women get their periods within seven days of the expected date .
However, in about 10 per cent, it may be delayed over seven days .
Therefore on average, you should get your period within seven days of the expected date – but it is possible to have delays for more than two weeks.
Given this information, then, what is the maximum delay in periods after taking morning after pill?
We don’t know. Potentially this can be different from one woman to the next. However, with a period delay of over six weeks, your doctor will consider other possibilities apart from the emergency pill.
If you are not pregnant, your doctor will check if this is related to your mental health, physical weight or other conditions that affect your hormones.
So if we ask the question – can the morning after pill delay your period for 2 months ?
Most doctors will say while this is possible; it is not common. They will recommend an examination and tests to check for other causes.
Hopefully, we’ve addressed the most common questions about period delays and other changes to the menstrual period after taking the emergency contraception pill.
Let us know in the comments if you have any more or ask here .
All AskAwayHealth articles are written by practising Medical Practitioners on a wide range of health care conditions to provide evidence-based guidance and to help promote quality health care. The advice in our material is not meant to replace the management of your specific condition by a qualified health care practitioner. To discuss your condition, please contact a health practitioner or reach us directly through response@askawayhealth.org
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Hi, I am 22 years old. I had my period on Feb 9 and ended up on Feb 14 and I had unprotected sex on 15 February I take the plan b on the same day after 4 days I had my period again is it normal ?
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This article was medically reviewed by Olivia P. Myrick , MD, a clinical assistant professor with the Department of Obstetrics and Gynecology at NYU Langone .
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Sanjana has been a health writer and editor since 2014. She has written extensively for platforms like Livestrong.com, Verywell Mind, and Times Internet. Her work spans various health-related topics, including fitness, nutrition, mental health, and wellness. Sanjana balances her love for chocolate with a penchant for fun workouts like aerial yoga and kickboxing.
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Plan B is a form of emergency
birth control
, often referred to as the morning-after pill, that can help prevent pregnancy in the event of unprotected sex or birth control failure.
Taking Plan B could affect the timing of your next period or cause other menstrual irregularities like bleeding between periods, and heavier or lighter menstrual flow. However, plan B's effects on your period shouldn't persist beyond one menstrual cycle.
Plan B should only be used as a backup in case you need emergency birth control. It should not be taken regularly or used as a replacement for other forms of birth control.
Here's how plan B may disrupt your menstrual cycle and what to expect after taking it.
"Levonorgestrel is the active hormone in Plan B," says Krishna Kakani , an MD who has her own OB/GYN practice.
Levonorgestrel is a synthetic progestin hormone that prevents pregnancy in two ways:
It's important to note that plan B works to prevent fertilization , it will not terminate a pregnancy if the egg has already implanted.
Since levonorgestrel affects ovulation and the uterine lining to prevent pregnancy, taking Plan B could alter the timing, length, and flow of your next period.
"Emergency contraceptives that contain levonorgestrel are most effective if taken within 72 hours of unprotected sex," says Kakani. Plan B is just one type of emergency contraceptive that contains levonorgestrel. Others brands include:
Levonorgestrel is also an ingredient in other forms of birth control like oral birth control pills, vaginal rings, contraceptive implants, and birth control patches.
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