How late may your period be after taking Plan B, forget Plan A?

maximum delay in periods after taking morning after pil

You may turn to Plan B if the condom, the pill, or, hey, no protection at all, hasn’t worked to avoid pregnancy.

It’s typical to excitedly look for evidence that an emergency contraceptive (EC), sometimes known as the morning-after pill, such as Plan B One-Step, worked after taking it. For once, you eagerly anticipate the arrival of your period! However, what if your flow is still problematic?

Plan B may postpone your period

Your menstruation may arrive a week later or a week earlier than usual after using Plan B since emergency contraception might alter the length of your menstrual cycle.

Plan B is unlikely to disrupt your cycle for several months. Therefore, you may be pregnant if you haven’t had a period two weeks after taking the morning-after pill.

Maximum delay in periods after taking morning after pill?

We understand if you are anxiously awaiting the arrival of your period while watching the time.

Everyone is unique, even though EC might cause your period to arrive up to a week early or a week late. Your flow returning could take even longer; it’s possible. The likelihood that you are pregnant, however, increases after about two weeks. So why was the maximum delay in periods after taking morning after pill caused? That particularly potent dose of progestin, or synthetic progesterone, levonorgestrel. 

Levonorgestrel is an anti-pregnancy drug in some hormonal birth control tablets, although the morning-after pill contains significantly more. This may negatively impact your menstrual cycle, including the delay of your period.

Details about Plan B

It is what? Plan B Emergency contraception (EC), also known as the “morning-after” pill, is a form of One-Step. To avoid getting pregnant after unprotected sex, it is utilised.

How does it work? Levonorgestrel, a progestin hormone that can halt ovulation, is present in it.

What time can you use it? The sooner you take it after the act, the better; it must be taken within 72 hours. 

How well does it work? Levonorgestrel-containing EC pills can lower the likelihood of becoming pregnant by 95% if taken within 24 hours and by 88 % between 24 and 72 hours.

Where may one purchase it? Most forms of emergency contraception are available over the counter in the United States. If you cannot afford it, you can go to a free or low-cost family planning clinic like Planned Parenthood (name brands often cost $60 to $50 or generics $11 to $40).

How was your first period after switching to Plan B?

According to a recent study, the duration of the menstrual cycle, the length of the period, and the appearance of the menstrual period changed significantly in roughly 15% of individuals who took Plan B.

What might occur when your flow returns are as follows.

timing and lag times

Your period may arrive on time, early, or after EC. Just keep in mind that neither way is greater than a week.

Recent studies indicate that the earlier you take Plan B in your cycle, the earlier your subsequent period will be. However, the study isn’t conclusive, so we can’t say if this is 100 per cent accurate for all EC users.

Period length

The same study discovered that taking EC can lengthen your period beyond typical. This was the situation if the morning-after pill was taken after ovulation. Additionally, your period’s length can remain constant.

flow velocity

You can experience a lighter or heavier post-Plan B period than usual.

According to FDA research, about 31% of women had heavy periods after taking Plan B. Heavier bleeding is even more likely to occur if you’ve taken the pill more than once a month.

Added symptoms

Headaches, cramping, and nausea are possible adverse effects of Plan B, but they should subside within a day. Cramping is probably just your menstruation if it lasts.

If you take Plan B, you may have increased fatigue or drowsiness and then experience heavier menstruation.

Blood will be dropped: How can you tell if the bleeding is from Plan B or your period?

It’s common to encounter some spotting or mild bleeding following Plan B that isn’t technically your period, which makes things bloody confusing. This is a typical adverse reaction to those additional hormones.
Here’s how to tell the difference between bleeding from a Plan B and your period:

⦁ Keep an eye on the time. Plan B bleeding frequently begins to flow several days after taking the tablet.
⦁ Keep a close eye on duration. The average duration of the Plan B spot is one or two days. However, it may last longer.
⦁ Extremely minimal bleeding Your menstruation won’t exactly resemble spotting. It may be a few drops of blood and is much lighter in colour.
⦁ Examine the symptoms and indicators. You probably won’t go through all of your typical periods problems, such as severe cramps and mood fluctuations. Plan B may also cause additional side effects, which often go away within 24 hours, such as:
⦁ nausea
⦁ abdominal pain
⦁ headache
⦁ fatigue
⦁ dizziness
⦁ breast sensitivity
⦁ vomiting
⦁ diarrhoea

PSA : Spotting occasionally denotes an early pregnancy, so monitor your cycle and get tested if unsure.

What if plan B fails and my menstruation comes two weeks later?

If taken the day after sex, Plan B is 95% effective, and if taken three days afterwards, it is 88 per cent successful. But there is always a remote possibility that it won’t.

  • If you use Plan B and your period is more than a week late, you could unintentionally be pregnant. To be safe, get a pregnancy test.
    Your chances of being pregnant are even higher if it has been two weeks. Therefore you should also get tested. Visit a doctor or midwife to confirm your pregnancy test result and discuss your choices if it is positive. Planned Parenthood advises delaying a pregnancy test for three weeks after using Plan B if you have irregular periods or are unsure where you are in your cycle.
  • Human chorionic gonadotropin (hCG), a hormone that the body begins to produce a few days after fertilisation, is measured in pregnancy tests. Therefore, a test administered too soon risks producing a false-negative result.

Can the morning-after pill give you two months’ delay?

After using Plan B for two months, you might be pregnant if your period hasn’t shown up. It’s improbable that the EC is still interfering with your cycle.

To be certain, take a pregnancy test and see a doctor or midwife as soon as possible.

Other factors that may cause a period delay to include:

⦁ chronic disease
⦁ stress
⦁ both tension and despair
⦁ low body mass
⦁ obesity
⦁ perimenopause
⦁ ovarian polycystic syndrome (PCOS)
⦁ thyroid problems


It’s difficult to predict how Plan B will alter your menstrual cycle because it affects everyone differently.

It’s probably nothing to worry about if your first period after using EC comes a few days earlier or later than usual. Take a pregnancy test after a week.

Everything should be back to normal by your second period following Plan B. Consult your doctor if you still have irregular periods.