Conception Calculator: Find Your Conception Date
Medically Reviewed by Dr Afzaal Ahmad
Table of Contents What is a Conception Calculator How Does It Work? How is the Conception Date Calculated and What is it Based On? Facts about Conception Calculating based on your Estimated Due Date Calculating Based on your LMP Calculating Based on Ovulation Dates/Fertile Period Calculating Based on your Ultrasound What Can Affect Conception Dates Is the conception calculator practical? FAQ’s What is a Conception Calculator A pregnancy conception calculator can help you determine when your baby was conceived, based on a few different factors such as the first date of your last menstrual period (LMP), the due date of
Conception Calculator: Find Your Conception Date
About The Author
Daniella Hall
Mom to an amazing and crazy toddler, Aaron, with a passion for women’s health and wellness. One the side she also loves being outdoors, baking and creating cooking videos with Aaron
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My girlfriend is pregnant and her due date is on the 29 June 2020.Her LMP was on the 23rd September 2019.We used to get intimate almost every day maybe 4times a week and she later on had sex with someone else I think around October on the 13th or 20 in 2019.So now I want to know who might be the father?
Hi I had protective sex with my partner the 20th March and unprotected sex every day, I’ve recently came of my contraceptive patch December so my periods have been a bit all over the place but they’ve all been regular before.. I had 2 periods January, no period February and I had a a bleed the 29th March for about 4 days. I took a test April 13th and it was negative, I then did a test 30th April the day after my period was due. Would I have been caught April with my partner?
Hello Sharnie, with irregular periods it is impossible to know do you ovulate and when you do. It is possible, but I can’t be certain with this much information.
I had sex with a woman who stop her family planning medicine for the first time on 28th December, 2015 and later had sex with another partner on 2nd January, 2016. Her due date was 14th September, 2016. I want to know who is the rightful owner or father to the child. When she stop the birth control method specifically the injection one, am the first person she had the sexual intercourse with on that 28th December, ,2015 before the second partner on 2nd January, 2016.
Hello Victor, Most probable conception dates: Dec 21, 2015 – Dec 25, 2015
Most probable dates of sexual intercourse that led to the pregnancy: Dec 18, 2015 – Dec 25, 2015
Possible conception dates: Dec 20, 2015 – Dec 30, 2015
Possible dates of sexual intercourse that led to the pregnancy: Dec 15, 2015 – Dec 30, 2015
Hello, I had intercourse with a guy on April 1st and then with my boyfriend after that
I am sorry the baby is due January 9th, 2021
I had intercourse with 2 men
I had intercourse with man A one time on April 1st
I did not sleep with it anymore after that and I just slept with man B. Who could be the father
Hello Dion Lane, most probable conception dates: Apr 16, 2020 – Apr 20, 2020
Most probable dates of sexual intercourse that led to the pregnancy: Apr 13, 2020 – Apr 20, 2020
My last period was Nov 22 if 2019. Me & the father had sex threw 1-8 of that month of Nov. Then on Dec 15 I found out I was 2 weeks pregnant by blood test I slept with this guy on Dec 3 only one time. Who could be the father???? Please help.
Hello Jill, I already answered your question on a different topic. Is that the only period you had sex with your ex? If the answer is yes, he can’t possibly be the father,
Hello… Mandy here,
I have 2 partners, so I had sex with my main bf right after my period it was around 5th of October and on the 26th of October with another partner.. now I’m 31weeks pregnant. Can u help me calculate when I fel pregnant.
Thnx in advance
Hello Mandy, Possible conception dates: Oct 18, 2019 – Oct 28, 2019
Possible dates of sexual intercourse that led to the pregnancy: Oct 13, 2019 – Oct 28, 2019
You also need to know that it is just an estimation and we can’t know the exact date.
HI I DON’T REMEMBER MY LAST PERIODS BUT I HAD. SEX WITH A GUY USING A CONDOM ON THE 20TH December and have sex with my boyfriend on the January a lot. my due date is 09 October, who’s the dad?
Hello Lungile, most probable conception dates: Jan 15, 2020 – Jan 19, 2020
Most probable dates of sexual intercourse that led to the pregnancy: Jan 12, 2020 – Jan 19, 2020
I’m due May 8-11, 2020 I had an irregular period on August 2….me & my boyfriend broke up like for 2 weeks so I had sex with a random guy July 25….& On July 27 all the way to all month of August me and my boyfriend had sex a lot of times & I missed my period for September I’m nervous so who could I possibly came out pregnant from?? So if anyone can help me out please with some advice I’ll appreciate it very much!!
Most probable conception dates: Aug 14, 2019 – Aug 18, 2019
Most probable dates of sexual intercourse that led to the pregnancy: Aug 11, 2019 – Aug 18, 2019
I had sexual intercourse with a lady on 28th December, 2015. She further had another sex with another guy on 2nd January, 2016 and her due date was 14th September, 2016. Now, who is the rightful father of the child? Her LMP date was 10th December, 2015.
Most probable conception dates: Dec 21, 2015 – Dec 25, 2015
Most probable dates of sexual intercourse that led to the pregnancy: Dec 18, 2015 – Dec 25, 2015
Possible conception dates: Dec 20, 2015 – Dec 30, 2015
Possible dates of sexual intercourse that led to the pregnancy: Dec 15, 2015 – Dec 30, 2015
So I had unprotected sex with guy#1 August 23-24 of 2019 and then Again on September 13-15 I bled on the 16th but very light which is unusual and it stopped after 3 days I had sex with guy#2 on the 26th of September my ultrasound shows I had gotten pregnant the week of my period who could be the father ?
While women are not able to conceive whilst on their period, sperm can survive within the female reproductive system for up to five days. Probably it’s the person with whom you had sex on 13-15.
I had sex with a partner a on the 12 December 2019, we used protection but when he withdraw the condom was stuck inside of me. Had to reach in to take it out.
On the 22 December i had unprotected sex with partner b and i missed my period in December which was due late December but never came. About a week ago i noticed my breasts where tender and the pregnancy test says I’m 3+ weeks pregnant. Partner b I’m starting my 4th week this week since we had sex and partner A it’s the 5th week.
Who is it likely to be the father?
Hello, it is more likely that the father is the first partner that you had sex with.
My period ended on 12/28 me and my boyfriend had unprotected sex on the 28, 30 & 31st and each time he ejaculated inside me. I’m curious to know could I be pregnant? I recently took a home pregnancy test (which i know its way to early to tell) but there was a faint line which made it come out to be positive. I’m waiting until my period gets here to take another test but I’m just curious to know could I be.
Hello Peaches, the chances of you getting pregnant on those dates are extremely low.
PLEASE HELP ASAP
I came on my period December 6th 2019, and my boyfriend nutted in me December 11th 2019. Can I get pregnant? And is my chances high of getting pregnant? My cycle lasts 5 to 6 days only.
Hello Andreca, chances of you getting pregnant at that time are really low.
I had a period on 4-27-19 I had sex with partner A up into 5/3-19 he went away then I slept with partner B on 5/4/19 he did pull out even though that means nothing lol. Then partner A and I had sex furthermore when he came back on 5/7/19. Who could be the dad?
Hi Myah
The person you slept with in between could be the dad. you had sex 7 days after the start of the new cycle and sperm can survive for up to 4 or maybe five days within genital tract, If your pre-ovulation period is short, the intermediate guy could be the father.
Hi…I had my period on the 8 of November and it ended on the 12 and had sex on the 16th ,18 21 ,22, 24 and 26.. when am I likely to get pregnant.
Hi Faiza,
Well, based on a regular 28-day cycle, if you started your menstrual period on the 8th you would be in the fertile phase around the 22nd – 26th of the month. The 22nd would be your most fertile day and the day that would be the most likely day you could get pregnant.
Ovulation is usually on the day 12-17, most likely day 14 if your period is regular. Most chances of getting pregnant are few days before the ovulation, on the day you are ovulating, and after ovulation 4-5 days.
So I had sex with partner A all of March 2019 but had sex once with partner b on march 20 2019
My due date is December 11th 2019 I need to know if partner a or partner b would be the dad.
Hi Jazlyn,
If your due date December 11th, you would have most likely conceived between the 16th and the 24th, so if you only had sex with partner B during this time he would most likely be the father. If you had sex with both, then it would be a little harder to figure out. You would need a DNA test unless there are obvious differences between the two guys (ethnicity, hair color, eye color, etc).