When you are having sex, pregnancy is always a real possibility. Sex, like other fun activities, comes with certain risks if you are not using protection, with STI’s and unwanted pregnancies being the most obvious ones.
If you want to know what’s the chance of getting pregnant if you had unprotected sex you have come to the right place.
Like others, you will hear many rumors about where and when you could get pregnant. For some women, the thought of getting pregnant is met with great joy and anticipation, while for others it’s a cause of worry.
This is why most women in the reproductive age or the ones who are trying desperately to conceive will have many questions or doubts about their chances of conceiving.
We will look further at this below to help you understand more about unprotected sex and pregnancy.
What’s the Chance of Getting Pregnant If You Had Unprotected Sex
There is a good chance that you could get pregnant nearly any time that you engage in sexual intercourse without using an effective birth control. This scenario is familiar to most women.
Pregnancy usually occurs around the ovulation period, the time when your ovary releases egg in the fallopian tube. If you are having regular periods, ovulation will take place midway between your menstrual periods.
Ovulation usually happens midway between the first-day of 2 consecutive periods, but this can vary from the eight day to the twentieth day of a 28-day cycle.
Researchers calculate the average risk at varying times in a monthly cycle of a woman, but you should know that your risk can be lower or higher.
You cannot know the definite time of your ovulation, which is why the researchers use the monthly cycle of a woman when calculating the average risk for pregnancy.
Figuring Out the Chances of Getting Pregnant If You Had Unprotected Sex
You are more likely to conceive if you have unprotected sex during the middle 2 weeks of your cycle. The time varies, but many women ovulate about day 14.
You will have the highest risk of pregnancy by having unprotected sex one or two days before your ovulation starts; when the ovary releases the egg.
This is a 30% chance. The risk of having unprotected sex and getting pregnant three days prior to ovulation is 15%. You will have a 12% chance on the ovulation day. [1]

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In the real world, large studies show that women who engage in unprotected sex during mid-cycle have a much lower chance of getting pregnant as the risk is around 5.8%.
This is because you will have a much lower risk of getting pregnant if you engage in any sexual relations on the ovulation day and any day besides the three days prior to.
Not Getting Pregnant After Having Unprotected Sex for Months
There are times when having unprotected sex is not enough for you to get pregnant. You could be doing this for months with no luck.
Thankfully, there are certain things that you could do to increase your chances if it’s taking longer than expected for you to conceive.
This includes doing thinks like monitoring your ovulation, using an ovulation predictor kit, charting your basal body temperature, as well as checking and observing your cervical mucus.
When you have an idea of your ovulating time, you can start to time your sexual activities around that period. If you are using this method, you must ensure that you are having sex 2 days before your ovulation day or every other day during the week of your expected ovulation. This will boost your chances of conceiving.
If it’s a case where you have been engaging in unprotected sexual activities for more than six months without success, you could visit your doctor or ob/gyn to know about the alternative treatments that you could use for fertility problems. There are several solutions available and they are very effective.
How to Know When You Get Pregnant
The most common sign of pregnancy after unprotected sex is missed period. However, this missed or late period is not a sure sign as there are many other things that can cause it besides pregnancy.
This includes using birth control that contains hormones, stress, sickness, improper eating habits, or too much exercise.
It is pretty common for teens to have periods which come later than normal or missed periods because it could take several years for them to have a regular cycle.
So, the best way for you to know if you are pregnant is to do a pregnancy test. These are easy to get nowadays because they are available at drugstores or health centers.
It is important to note that the home pregnancy tests are ninety-nine percent accurate if taken after you miss a period.
Hopefully, you will now know what’s the chance of getting pregnant if you had unprotected sex.
Do you have a question about your period, ovulation, pregnancy or other related topic? Check out our Frequently Asked Questions page.
Wondering if you’re pregnant? Try our Online Pregnancy Quiz and get a rough estimate of your chance of being pregnant.
Read this post to learn more about when is the right time to take a pregnancy test.
References
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1. http://www.thedoctorwillseeyounow.com/content/womens_health/art3356.html





I had unprotected sex with my boy friend on 10th October and i had my period after 20 days i.e., on 30th October.. is there is a chance of me getting pregnant?
hi, if you got your period like you say you did then you’re not pregnant. you can confirm this with a pregnancy test just to be sure.
I m not pregnant. My age is 32+.My menstrual cycle changed for 35 days for last two months. But before that it was of irregularly of 30 days. I m not pregnant. I m afraid whether will I become pregnant or not. Please help. Thanks in advance
My periods was between 5 to 10 Oct 2015 and I had my unprotected sex on 25 Oct 2015 is there any possibility of getting pregnant? Please let me know fast….
Your chances of being pregnant depend on whether you were fertile on or around the date that you had sex. It is important to know the number of days in your menstrual cycle. This information is needed to provide you with the most accurate response.
My last period was on October 15-19 had unprotected sex on October 30. Started vomiting on November 9. Cramps back ache, nausea, head ache, bloating, tender breast and diorreah since November 10, 2015. Could I be pregnant.
Had my period October 15-19, 2015. Had unprotected sex on October 30. Ran a temp. November 7 and started to vomit on November 8. Could I be pregnant?
Your chances of being pregnant depend on whether you were fertile on or around the date that you had sex. Can you confirm the number of days in your menstrual cycle? This information is needed to provide you with the most accurate response.
28 days
Thank you for providing the information. With a 28 days cycle, you were fertile from October 27 to 31, 2015. It is possible for you to conceive since you had sex on the 30th.
Hi, Well once you have unprotected sex there is always the possibility of becoming pregnant,Take a pregnancy test if its negative wait a week or 2 and test again.
I have a big problem. So i had unprotected sex the day i got off my period Saturday Nov 7, well midnight so more so the 8th. That same day i started taking birth control pill. What are my chances of getting pregnant. My cycle only last 5 days and according to my period calender app it says my fertile days are 17th -23 rd and my ovulation day is the 22nd. Should i continue taking birth control to stop pregnancy or should i take a plan b pill as well
Hello, Birth control is only effective if taken as directed,plan b only works if taken within 72hrs preferably 12 hrs after unprotected sex.
i had my period on oct 25th 2015 i had sex once with condom on 31 oct and them again on nov 7 and 8th nov did not use a condom coud i get pregant
I had my period on October 16, 2015 and my period usually lasts about 3-5 days…I had unprotected sex on November 8, 2015. According to my period tracker app…I am due to have my period tomorrow, which have been pretty spot on….What are the chances of me being pregnant?
Your chances of being pregnant would be low. You were fertile from October 25 to 29.
By the way, we had sex three times during my last menstruation without any protection.
Hello! Could you please help with this problem. My menstruation last August was on the 25th to 29th and my next menstruation was October 5 to October 10. I had sex with my boyfriend on October 7-9 during my menstruation. Until now, I didn’t have my menstruation for the month of November. Is it possible that I got pregnant?
Hello ,
So my last period was October 12 it lasts for 4 days my cycle is 28-29 days I had unprotected sex on the 24th and the 25th and on the 25th I took two of my birth control pills (my first time using birth control) on the 26th I was arrested I took a pregnancy test in jail it came out negative on the 27th I was released I took 2 to make up then I took it on the 28th then stopped because I was having bad side effects….on Nov 7th I had unprotected sex again and took three pills after so today Nov 8 I took one of the 7 day pills that are suppose to bring your period on and I’m getting menstrual cramps but I haven’t started what are my chances of being pregnant after taking so much pills?
Hello, The pill only works properly if taken as directed, so its possible you could be pregnant or the pill delayed your period.The only way to know for sure is to wait a while and take another test or visit your doctor.
i had a period on October 7, 2015(5 days). I had sex with my boyfriend October 23-27. My cycle normally goes every 21-25 days. I was expected to have my next period on November 1st but it didn’t come until November 4th (4 days) He didn’t fully ejaculate inside of me but he did pre ejaculated inside of me October 23 -25. I took a test on November 1st and it came back negative, and I got my period on November 4th. Could I have conceived or am I just paranoid ? Or do I need to wait for my next period ?
I had my period on the 3rd of October and I have an ovulation period of 32 days. I had sex on the 19 of October he partially cum in me. I suppose to see my period on the 5 of November but had a missed period. I have been feeling some how lyk abdominal pain, nausea but no breast tenderness and no spotting. Am I pregnant?
You can get the most accurate result if you wait at least one week after missing your period. In addition, the result might be even more accurate if the test is done first in the morning as the urine is far more concentrated at this time. The urine-based home pregnancy tests offer great accuracy.
I started my period on Oct 15th I run a 28 day cycle my partner and I had unprotected sex on Oct 27th. what are my chances of becoming pregnant???
Hi, Once you have unprotected sex the possibility of getting pregnant is always high.
My girlfriend took some contraceptives three days ago…. And we had unprotected sex today….. Can she get pregnant???
Hello, If she took the contraceptive the way it should be taken then the possibility is very rare but if she did not take it how it should’ve been taken then it would not work and she may become pregnant.
My girlfriend – we had a sex just last night her periods started October 24 and we had unprotected sex. Could she possibly get pregnant?
The chances of being pregnant depend on whether she was fertile on or around the date that you had sex. It is important to know the number of days in her menstrual cycle. This information is needed to provide you with the most accurate response. If for instance she has a twenty-eight days cycle then she would be fertile from November 5 to 9. This means that the chances of being pregnant would be high only if she has a 28 days menstrual cycle.