But unfortunately, side effects can happen.
Many people find their period unpredictable or irregular for a few weeks after taking it.
NOTE
The morning-after pill should be used ASAP after unprotected sex.
The longer you wait, the less effective it becomes.
Its also not a replacement for daily birth control pills.
How does Plan B affect your period?
OB/GYN atJohns Hopkins Bayview Medical Center
After you take Plan B, your next period might be a little wonky.
This relates to how emergency contraception works.
Long story short, if theres no egg to fertilize by sperm, you cant get pregnant.
But delaying ovulation can affect your period.
On the other hand, some people get their period earlier than usual, according to Planned Parenthood.
Lighter or heavier bleeding than normal (i.e., what youre used to) is possible, too.
But it can also have other possible, minor side effects.
Plan B spotting vs. implantation bleeding
Light spotting is a common side effect of Plan B.
So, how can you tell the difference between the two?
OB/GYN atJohns Hopkins Bayview Medical Center
Heres How I Finally Figured It Out
That can be tricky, Dr. Brar says.
But as we learned, Plan B can have some of these side effects as well.
The best way to rule out a pregnancy?
Is it normal for Plan B to mess up your cycle for months?
It isnotnormal for Plan B to alter your menstrual cycle for months, Dr. Shorey says.
Most people will get their period within one week of the expected time, she adds.
But if your cycle seems off months after taking Plan B, you might be wonderingwhat gives?
Many aspects of your medical history may also play a role in your period timing, Dr. Shorey says.
Endometriosis and otherhormonal imbalancescan also mess with your menstrual cycle, Dr. Brar adds.
You should also see a doctor if you have lower abdominal pain orpersistent irregular bleeding, Dr. Shorey says.
This might also be a good time to chat with your doctor about prescribing Plan B for the future.
Your doctor can typically prescribe it for you to help reduce the cost and ensure its availability.
FAQ
Can Plan B cause two periods in a month?
Sometimes Plan B can cause irregular bleeding or spotting, Dr. Shorey says.
How many times can you take Plan B in a month?
Thats because it doesnt work as well as other forms of birth control, Dr. Brar says.
And it may be less effective for certain groups, such as people with obesity, Dr. Shorey adds.
Plus, another thing to consider?
Plan B wont protect you against sexually transmitted infections.
What is the maximum delay in periods if youre not pregnant?
Can you take Plan B if youre nursing?
Rest assured, it is safe to take when breastfeeding, Dr. Brar says.
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