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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Does Intake Of Plan B Pill Cause Delayed Periods?

Hi I had unprotected sex about 2 weeks ago and I had the plan B pill few hours after that. I must be on my period now but it haven t started yet. I was wondering if there is a chance after consuming the pill there is still the possibility of becoming pregnant? Also I started birth control pills 5 days after the plan B pill
Tue, 27 Dec 2016
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General & Family Physician 's  Response
Hello dear
I understand your concern
You took the postinor 2 with in few hours.
It is highly effective in pregnancy around 95-97%.
So failure is just 0-5%.
Delayed period could be due to pill as it contain high progesterone and cause prolongation of second phase of cycle.
Period may be delayed by 1-2 week.

birth control pill will you not protect you from the pregnancy as you start from between.
It should be stared from the first day of cycle.
If you have on birth control pill still then period will come when you stop the birth control pill.
If period will delay by more than 14 days then consult the gynecologist and undergo urine pregnancy test and or blood HCG to confirm the pregnancy.
Avoid stress, take healthy diet, drink plenty of water and do regular exercise.
Hope this may help you

Contact further if follow up needed
Best regards
Dr. Sagar
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Does Intake Of Plan B Pill Cause Delayed Periods?

Hello dear I understand your concern You took the postinor 2 with in few hours. It is highly effective in pregnancy around 95-97%. So failure is just 0-5%. Delayed period could be due to pill as it contain high progesterone and cause prolongation of second phase of cycle. Period may be delayed by 1-2 week. birth control pill will you not protect you from the pregnancy as you start from between. It should be stared from the first day of cycle. If you have on birth control pill still then period will come when you stop the birth control pill. If period will delay by more than 14 days then consult the gynecologist and undergo urine pregnancy test and or blood HCG to confirm the pregnancy. Avoid stress, take healthy diet, drink plenty of water and do regular exercise. Hope this may help you Contact further if follow up needed Best regards Dr. Sagar