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Doctor insights on: Does Plan B Work If You Take It Within An Hour Of Unprotected Sex During Your Most Fertile Day

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) does Plan B work during the whole cycle including ovulation or most fertile days after taking it 24 hours later after unprotected sex?

) does Plan B work during the whole cycle including ovulation or most fertile days after taking it 24 hours later after unprotected sex?

Yes: Plan b works at any point in the cycle. Plan b prevents ovulation, so of course, if you've already ovulated, it won't affect course of cycle. Best is to take it immediately after unprotected sex as it has the highest effectivness then. ...Read more

Dr. Khurram Rehman
1,639 Doctors shared insights

Fertility (Definition)

Fertility refers to the ability of a woman to conceive a child, or to the ability of a man to ...Read more


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I had unprotected sex 1 week ago. I took plan b within 12 hours. Just now deep brown discharge is this normal? I have normal cycle. Was during fertile

I had unprotected sex 1 week ago. I took plan b within 12 hours. Just now deep brown discharge is this normal? I have normal cycle. Was during fertile

Do a test: If you miss your period, wait about a week and have a test and/or exam. Please do consider the right type of protection for you and use it properly every time if it matters to you (sounds like it does). Good luck! ...Read more

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Does Plan B work 22hours after unprotected sex. Only pre ejaculate and on most fertile day?

Does Plan B work 22hours after unprotected sex. Only pre ejaculate and on most fertile day?

Yes: For it to be effective, it needs to be taken within 72 hours of unprotected intercourse. Expect that you will experience some confusing breakthrough bleeding and a delay in your next cycle. Also, check a pregnancy test in about 2-3 weeks. ...Read more

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Unprotected sex on thurs around 10a during my fertile week Took Plan B Friday evening around 6p then sex again during ovulation took p/b 16hr aft?

Unprotected sex on thurs around 10a during my fertile week Took Plan B Friday evening around 6p then sex again during ovulation took p/b 16hr aft?

Doubt pregnacy: You seem to have unprtected sex and then use Plan B. If you are a responsible adult you will get on birth control and ALSO use condoms when having sex: be responsible for your sexual actions. ...Read more

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Had unprotected sex on most fertile day. Took plan b morning after. Few hours later experienced cramping and cramping has continued for a full 48 hour?

Had unprotected sex on most fertile day. Took plan b morning after. Few hours later experienced cramping and cramping has continued for a full 48 hour?

This may be a Plan B: Side effect. Potential side effects w emergency contraception include: menstrual flow changes (spotting, bleeding, early or late period), nausea, vomiting, dizziness, fatigue, headache, breast tenderness & abdominal pain or cramps. Take pregnancy test & notify dr if your period is 7 or > days late. ...Read more

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Good afternoon, my boyfriend and I had unprotected sex while I was Fertile which was 9 days ago to be exact I took the pill with In 3 hours The Plan B?

Good afternoon, my boyfriend and I had unprotected sex while I was Fertile which was 9 days ago to be exact I took the pill with In 3 hours The Plan B?

Plan B: Plan B decreases the risk by about 70 %. Always check a pregnancy test about 2 weeks after use or if you miss your menstrual cycle to confirm that it worked. Consider starting birth control to avoid these scares in the future. ...Read more

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Had unprotected sex while I was fertile on 4/20. Took plan b 3 hours later. Within a week I was spotting. Still haven't gotten period. Should I worry?

Had unprotected sex while I was fertile on 4/20. Took plan b 3 hours later. Within a week I was spotting. Still haven't gotten period. Should I worry?

Spotting is common: Spotting is commOn side effect of plan B.if you missed your period do a home pregnancy test
Plan B is effective only 89% of time if taken within 72 hours ...Read more

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I ovulated yesterday and had unprotected sex, didn't take any pills until the next day. The next day we had unprotected sex again and then I took plan b after. Would it still work?

Decreases risk: Taking Plan B lowers the risk of unplanned pregnancy. It sounds like you should consider starting long term birth control to help prevent these scares. There are many options. You can schedule a virtual visit on healthtap today and discuss the options and get a prescription from a doctor in your state. ...Read more

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Should I take Plan B pill if I had unprotected sex the 8th day after starting and if I missed 1 pill during the week but took it the morning after.

May not need to: Missing one birth control pill is not optimal but doubling up the next day should keep most women protected from unwanted pregnancy. There is no guarantee however so Plan B is not a bad idea if you want to be sure. ...Read more

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Had my period on 4/11 and had unprotected sex on 4/19 during high fertility/ovulation. Took plan B 54 hours later. Will it work?

Had my period on 4/11 and had unprotected sex on 4/19 during high fertility/ovulation. Took plan B 54 hours later. Will it work?

120 hours: Plan B should be taken within 5 days (120 hours) of unprotected sex and can reduce the risk of pregnancy up to 89%. But it is more effective the sooner you take it. ...Read more

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I'm taking birth control, sometimes an hour later than usual, still works or should I take plan b if I had unprotected sex?

I'm taking birth control, sometimes an hour later than usual, still works or should I take plan b if I had unprotected sex?

You should be okay: Varying the time of birth control dose by an hour or so daily is not significant enough to alter its effectiveness, as long as you continue to take your daily dose. Missing a full day or two does reduce its effectiveness as well as some medications. With unprotected sex, you are still at risk for sexually transmitted infection so I do recommend both. ...Read more

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If a girl takes a plan B pill 4 hours after unprotected sex then 25 hours after she took the pill she puked...does that mean the pill didn't work?

If a girl takes a plan B pill 4 hours after unprotected sex then 25 hours after she took the pill she puked...does that mean the pill didn't work?

No: By that point the hormones in the pill are in her system & will do what they do. Her vomiting probably reflects the hormone effecting her body-a side effect of the med, not a sign it failed. ...Read more

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I had unprotected sex but he didn't ejaculate anywhere near my vagina. My period came later the same day. Is plan b necessary? Is it safe to take whilst on my period?

I had unprotected sex but he didn't ejaculate anywhere near my vagina. My period came later the same day. Is plan b necessary? Is it safe to take whilst on my period?

No need: If you are having a period after sex, plan B is not needed. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD.
Practice safe sex.
Get HPV vaccine. ...Read more

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Me and my bf want to have unprotected sex cause it feels nice we took the Plan B pills once after sex if we take it aqain wilk it still work right?

Me and my bf want to have unprotected sex cause it feels nice we took the Plan B pills once after sex if we take it aqain wilk it still work right?

Risky: It has a high chance of success but it still has a small failure rate. I recommend using a reliable form of contraception that will cover you all the time rather than use sporadically with plan B after intercourse.
best wishes
Dr M ...Read more

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Unprotected sex during ovulation 8-7.Took plan b within 1hr. Took ovulation predictor 6 days later 8-13. it says im at peak. Will planB still work?

Unprotected sex during ovulation 8-7.Took plan b within 1hr. Took ovulation predictor 6 days later 8-13. it says im at peak. Will planB still work?

Your question is...: ...confusing b/c you're suggesting that u might be ovulating x2 this cycle. Did u base your 8/7 ovulation on the calendar and the 8/13 on the OPK? If your periods are irregular, u should go by the OPK results. If u took Plan B early in your cycle, u could still ovulate 6 days later. Don't count on Plan B from 8/7 to prevent ovulation today! ...Read more

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My bf & I had unprotected sex yesterday & this morning. If I take Plan B now will it still work considering we did it twice unprotected?

Yes: Plan b is not perfect. But it will work for most people in your situation. After that, think of a long term method with which you are comfortable. ...Read more

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I don't normally take birth control. But I had unprotected sex and was told if I take 3 birth control pills it works like plan b? Is this true? How?

I don't normally take birth control. But I had unprotected sex and was told if I take 3 birth control pills it works like plan b? Is this true? How?

Not exactly: Some pills are designed to be emergency contraception pills (those work best). Regular birth control pills have various hormones in them, and SOME types of those pills can be taken to try to prevent a pregnancy. One can also get an IUD, which works well as emergency contraception (ask one's Ob-Gyn doctor). A reference table can be found at: http://ec. Princeton. Edu/questions/dose. Html#dose ...Read more

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Took 2 Plan B in one week after unprotected sex during and after ovulation? Does it still work?? And cramping on and off 5 days before expected per.

Yes: Plan B can work in one of three ways depending on where you are in your cycle. It can prevent or delay ovulation, can interfere with the fertilization of the egg or may prevent implantation by altering the lining of the uterus. If you take Plan B One-Step within 24 hours, it is about 95% effective. ...Read more

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Is it needed to take a Plan B pill after pre ejaculation when pulling out during unprotected sex and is it safe to take the pill during my period?

Is it needed to take a Plan B pill after pre ejaculation when pulling out during unprotected sex and is it safe to take the pill during my period?

Two questions: Yes, take Plan B after pull-out if you are in your fertile phase. Pull out is not an adequate form of birth control. Try using condoms. If you are having sex during your period, you can't get pregnant, so Plan B is unnecessary. ...Read more

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Had unprotected sex while on birth control (pills), during off week, just started period, he ejaculated inside me, should I take plan b? Been on bc 1yr

Essentially no risk: If you were taking your bcp as prescribed and this was your off week, during which you had your period, you will have very, very low risk of getting pregnant. Resume taking your bcp as prescribed for the start of your 28 day cycle. Meanwhile you may want to refresh your education a bit about other hazards of unprotected sex, such as sexually transmitted diseases. ...Read more

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I had unprotected sex on ovulation day with withdrawal. Took plan b after 12 hours. Will plan b still work?

Try Ulipristal/Ella: Unfortunately the primary mechanism of Plan B is the prevention of ovulation, but if the cat's already out of the bag, meaning you've already ovulated, then there might not be very much that Plan B can do. You may however call your doctor and ask for a script for Ulipristal or EllaOne which is more effective than Plan B and safe for the prevention of pregnancy at up to 120 hours. Good luck! ...Read more

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I had unprotected sex, took the Plan B but had sex the next day. Should I take another plan B or since it did not pass 24 hours, the first one will do?

I had unprotected sex, took the Plan B but had sex the next day. Should I take another plan B or since it did not pass 24 hours, the first one will do?

It will likely: Still cover you but Plan B is only designed to be used when other forms of birth control fail. You need to be responsibily use some form of protection every time you have sexual intercourse if you are not ready for pregnancy. ...Read more

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I had unprotected sex on the 16th day of my cycle. I was afraid of the pre semen. I took Plan B after 3 hours. Will it work? I have a 26 days cycle.

I had unprotected sex on the 16th day of my cycle. I was afraid of the pre semen. I took Plan B after 3 hours. Will it work? I have a 26 days cycle.

It should work: Plan B works most of the time, but not all of the time. One should do a home urine pregnancy test 3 weeks after Plan B. Also, use reliable forms of birth control so that Plan B will rarely be needed (hopefully never) in the future. If cycles are a very-regular 26 days, ovulation is probably on day 12, which means by day 16 the egg is dead (but life can surprise you sometimes). ...Read more

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I had unprotected sex a day before ovulation. Took Plan B 23 hours afterwards. I am overweight, could that have effected the pills ability to work?

I had unprotected sex a day before ovulation. Took Plan B 23 hours afterwards. I am overweight, could that have effected the pills ability to work?

Perhaps: There is some evidence that emergency contraception (EC) progestin-only pills are less effective if your BMI is >30. Ella/ulipristal acetate may be more effective than the Plan B/progestin only. Having a copper IUD inserted as EC is the most effective, 99%, equally so among all women regardless of weight. Reliable non-emergency contraception is your goal. Best wishes:) ...Read more

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I had unprotected sex 2 weeks ago, I was on my 3rd day of starting birth control. I did take Plan B within 3 hours of having sex. My chances?

I had unprotected sex 2 weeks ago, I was on my 3rd day of starting birth control. I did take Plan B within 3 hours of having sex. My chances?

Take a test: Don’t guess. Take a test. They are the same tests used in a doctors office. They can detect a pregnancy 7-10 days after conception. The best time to take one is when you miss your period. If you doubt the result you can repeat it in 1-2 days. If you were pregnant the hormone level would rise enough for detection. ...Read more

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I had unprotected sex the day my period was ending I am on a combination birthcontrol however I was scared because I did not take it at my time so I took plan b 2 hours after 9 days later I began bleeding as if I was on my period. It was much more than I

I had unprotected sex the day my period was ending I am on a combination birthcontrol however I was scared because I did not take it at my time so I took plan b 2 hours after 9 days later I began bleeding as if I was on my period. It was much more than I

Learn more...: Plan B can alter the menstrual period for the cycle in which Plan B was taken, and sometimes the next cycle too. One should be sure to check a home pregnancy test about 3 weeks after sex because Plan B works most of the time, but not all the time. Learn more about your birth control pill from your doctor. With a COMBINATION pill, one can stray from her "pill taking time" several hours and be fine. ...Read more

Dr. James Lin Dr. Lin
1 doctor agreed:
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Does Plan B work if taken on ovulation day? I had unprotected sex (not ejaculated inside of me) the day before ovulation began and took plan b.

Dr. James Lin Dr. Lin
1 doctor agreed:
Does Plan B work if taken on ovulation day? I had unprotected sex (not ejaculated inside of me) the day before ovulation began and took plan b.

Here are some. ..: Nowadays, how to handle the uncertainty of pregnancy has changed through the readily available HPT, which has taken away the anxious second guess with clinical suspicion of morning sickness. So, do HPT soon after missing the regularly expected period and repeat it in 1 wk if the 1st test is (-) & still in doubt. Besides, note: no known contraceptive measures have ever offered 100% success. ...Read more

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Would Plan B work if taken on the 4th day after unprotected sex?

Maybe: It is best to start emergency contraception as soon as possible after unprotected sex. If started within 72 hours, it is highly effective. It may still work if started later and it will not harm the baby if you do get pregnant. ...Read more

Plan B (Definition)

Levonorgestrel is a women's ...Read more