Had unprotectrd sex early Wednesday morning about 1am and didnt take plan B until Wednesday night about 8pm. And my period calendar say I ovalute that Thursday. Then Friday morning I had sex about 1am, 7am, and 4pm but at 4pm we had unprotected sex. I'm not sure if I will or wouldn't get pregnant.
Does the Plan B change the day I ovalute? And do I have to purchase another one ?
- Asked
- 6 Feb 2016 by Tyarna1991
- Updated
- 7 Feb 2016
- Topics
- plan b, emergency contraception, sex, period
Responses (1)
The way that Plan B works, is by delaying ovulation. If it is too late to do that, then you may become pregnant. If it can delay ovulation, then it is said to be around 90% effective if taken within 12 hours of the unprotected sex. It gradually becomes less effective until the last point it can be taken (72 hours/3 days) when it is around 75%.
It is thought it might work in other ways, but the Manufacturer is unable to guarantee those as they are not proven.
The Manufacturer states that Plan B does not cover you for any other episodes of unprotected sex, once you have taken the drug.
You are not meant to take more than one dose of Plan B in any one cycle. It is a huge dose of hormone to take once, & there are no studies done on the side effects of an overdose.
Women who have taken it twice in the same month, report significantly worse side effects. Plan B is known to cause many women lots of hormonal side effects for some time after using it, but to take an overdose could leave you with things like very heavy bleeding in the first place, then spotting (brown/pink/red), irregularity or no periods for months. The cramping could well be very significant, as could symptoms such as nausea, fatigue, mood swings/depression & others. The long term side effects are not known if overdosing.
It is therefore up to you as to whether you take a further dose.
The other option you have, is to have a Coil/IUD fitted within 5 days/120 hours of unprotected sex. This can act as emergency protection, & can also be left in place for longer term contraception. A doctor or family planning clinic can do this for you.

Further Information
- Plan B Information for Consumers
- Plan B Information for Healthcare Professionals (includes dosage details)
- Side Effects of Plan B (detailed)
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Lou, we both come from countries with universal healthcare (in theory) and please don't see this as a personal attack as your advice is almost universally excellent. An IUD in the USA probably costs several100's of dollars including placement with no follow up to make sure it has been done properly. I wouldn't recommend one to anyone in the US and second world countries who plans to have children in the future and the failure rate results in ectopic pregnancies up to 10% of the time.
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IUD's have not been been popular in Australia since the "Mirena copper 7" killed a number of Australian women and a number more had to have hysterectomies due to toxic shock and uterine perforation in the 1980's. Given the level of understanding about their own bodies here; e.g. a couple of months ago, a young girl with an IUD was having her second ectopic pregnancy and was concerned it might interfere with her plans for a family in the future and her fertility (thanks southern school boards). While I find abortion pills morally and ethically questionable they are probably safer in the long term once a pregnancy has been confirmed.
Well, the beauty of a site like this is that the person posted is entitled to everyone's opinion.
Mine is not to judge financial status or even to know where in the World the OP is!
Mine is to give all the possible options for emergency birth control, which includes an IUD/Coil, & it is down to the OP to decide what path to follow.
I would never miss out an option because of my own personal opinion on a topic. I may share my opinion, if it's appropriate, but I even veer away from that, unless I feel it essential. I wouldn't NOT suggest that Plan B is an option, or an abortion clinic is an option, due to my own beliefs or opinions (if they were against such things). I'd give all the options.
I'm not sure how many IUDs you've have fitted, Stephen, but I've had many. I've never had a problem in terms of risks.
Having a baby is one of the most dangerous things a woman can do!
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The long term implications of using drugs like Plan B are weak in terms of research. We haven't been on the planet long enough.
Every form of birth control comes with it's set of risks, & it is for me to give the options, & the OP to make the decision.
Here in the UK, IUD's & Coils are used very safely & effectively. They won't suit everyone, but they are a viable option of emergency birth control.
I am not about to stop giving the OP all the options, because someone told me to only give half the options, due to their own personal preference.
Many women from many different countries read these posts over time, & deserve to know ALL the options available. It is a scary thing to be pregnant, if it is not what you want! An abortion is far more dangerous & potentially causes more infertilities than the risks associated with an IUD/Coil. I will dig out the figures for you on the paper I was reading on this.
If you've taken Plan B, & don't want to risk overdosing with another Plan B, or you can't take Plan B for whatever reason, then you are entitled to know there is another option. To have that kept from you because of someone's personal opinion, is pretty shocking & reminds me of times abortion is illegal due to religion or peer pressure.
A woman has the right to choose. IUDs are no more risky than many of the other options, & I won't stop telling women, as they have a right to be given the options & to research them & make their own choice.
I was deliberately trying not to get up your nose, but since I've been here I have been caned for providing advice that involved abortion outright because it was against someone's belief in the supernatural. I have had posts stolen and then cut and pasted back in with another members name. I generally keep my mouth shut on the subject of SSRI's and SNRI's because my views on their effectiveness or lack thereof. I am a Liver specialist (my specialist asks me for ideas. I audit classes at college as I can't afford tuition while I still have unpaid student loans from the last two degrees (3 science majors). Sadly people tend to only hear what they want to. I am outspoken an Alcohol and drug abuse. I have also discovered that earlier I had dispensed advice to people in the US that would be free to you and I but $5000 US to the uninsured.
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People don't generally seek advice for free if going to the doctor is free, blood tests are free, diagnostic imaging is free, public specialists are free. Private specialists only cost AU $80. People who earn less than AU$40,000 get AU$6.20 prescriptions.
This is a US site with content that is denied foreigners unless you use a VPN. Given that it is primarily for US residents without heaps of cash, my advice needs to be modified for the target audience. No it's not ideal, but neither is telling someone to get an MRI that will cost them three months rent. If they have an improperly fitted IUD you or my partner (e.g. we use condoms would just make an appointment for tomorrow or the day after and get the problem addressed for free. These people rarely have that luxury. Many of the girls (not this case) seeking advice here are under 18 and need to be 17 and/or need parental approval for things that would be totally private here or the UK. Heres an idea; why don't we just block each other now and you won't be able to see my non judgmental advice (excluding alcohol and drug abuse) and you can dispense mostly excellent advice that is, at times, completely unaffordable. Take care, Steve.
Okaaaay... wow!