Implantation is a critical step in the process of conception that isn’t always spoken of or understood. While it’s absolutely vital to get right, many hopeful parents aren’t educated on the subject and so they’re missing out on the key to getting pregnant.
While the intricate details of implantation aren’t fully known, we have developed a calculator to help pinpoint the most likely days to achieve implantation during your menstrual cycle -> CLICK HERE to go straight to the calculator.
Table of Content:
- What is Implantation
- Implantation Bleeding Calculator
- Signs of Implantation
- Implantation Timing
- How To Use an Implantation Calculator
- Final Words
- Frequently Asked Questions
What is Implantation?
Implantation is the end product after the sperm comes into contact with the egg and fertilizes it. This is called a zygote. It then travels to the uterus where it attaches itself into the uterine lining [1].
This is the process, and without implantation, pregnancy is not possible and the body will naturally eliminate it during your next cycle.
Implantation Calculator
When did your last period start?
How long is your cycle?
Possible Signs of Implantation
After implantation occurs, it’s normal to see some light bleeding or spotting. This is actually from the embryo attaching to the uterine wall and is nothing to be concerned with. It’s actually a good sign! However, this is not a necessity.
Not all women experience implantation bleeding or cramping. This can happen roughly 10 to 14 days after conception, and implantation bleeding is generally significantly lighter than a regular period [2].
Some might also start to notice the very first signs of pregnancy at this point such as breast soreness and fatigue [3]. Additional symptoms that you might notice other than the obvious of a missed period, could be moodiness, aversions to certain foods, bloating, and nasal congestion and even constipation [1].
As you notice, some of these are very similar to those of PMS so noticing them might not even happen until you get a positive and can link the two.
The hormone levels increase right away and this is your body changing to start to accommodate a new life and help it grow.
Implantation Timing
The timeframe for implantation is anywhere from seven to twelve days after ovulation, however generally occurs right around day nine [5].
Once this process has occurred some of the most sensitive pregnancy tests can determine pregnancy, but sometimes it takes another day or so. Which is why it’s recommended to wait until a missed period to take a pregnancy test [1].
After implantation has occurred, the body starts to produce the pregnancy hormone, Human Chorionic Gonadotropin (hCG) [4]. For pregnancies that last more than six weeks, the first appearance of hCG occurred 6 to 12 days after ovulation; 118 women (84 percent) had implantation on day 8, 9, or 10 [5].
Calculating the days of your cycle, ovulation, and the most likely days for the embryo to implant can be confusing. If you are having trouble conceiving, using an ovulation or implantation calculator to get the best estimate for your most fertile period can be helpful in getting pregnant.
It can also put your mind at ease to calculate your implantation dates so if you see light bleeding, you’ll know if it’s possibly related to the embryo implanting rather than your next period or a miscarriage.
But, just be aware that many times implantation bleeding happens around the time of your next period.
How To Use The Implantation Calculator
The calculator is simple to use and just like the most of the other calculators available to you, the only information you need to know is the day you started your last period and the typical length of your cycle.
Once you plug in those numbers, the calculator will give you several dates that are important for you to know when trying to conceive:
Estimated Fertile Period – This is the range of dates that you’re most likely to be fertile or in other words when an egg is most likely to be released from the Fallopian tubes.
Implantation – This is the range of dates that, if an embryo was formed and it united with sperm and was fertilized, it would likely make it to the uterus to implant itself in the wall.
Most Likely Date Range – Most implantation occurs on days 8 to 10, so this is the range of the most likely days for implantation according to when 84% of women experience it.
Once the calculator is finished, you’ll have your date ranges as well as a chart that shows you the days past ovulation (DPO) with the highest probability of implantation.
This information is helpful to look at so you can pinpoint the possible cause of any cramping or bleeding you may experience that could be related to implantation of an embryo.
To Conclude
It’s important to note that the calculator only provides an estimation of your ovulation and implantation dates according to the information provided. This means that if you aren’t accurate with your LMP you might not get an accurate result.
It can also be skewed if you have an irregular period in which the length of your cycle isn’t the same every month or varies significantly.
If that is the case, then the recommendation would be to speak with your doctor about the possibility of helping to regulate your cycle.
In addition, if you’ve been trying to conceive for longer than six months with no success, it may be a good idea to talk to a doctor and work together to form a plan for conception. This, in conjunction with the calculator, could help you determine what your symptoms are actually due to.
Frequently Asked Questions about Implantation Bleeding
How do I know if it’s implantation bleeding or my period?
How long will implantation bleeding last?
When should I be concerned?
I think I had implantation bleeding, when can I take a pregnancy test?
I have no symptoms of implantation, can I still be pregnant?
Does every woman experience implantation bleeding?
References
- Healthline. Implantation Cramping: Timing, Location, and More.
- Study. What is Implantation in Pregnancy? Symptoms & Signs. [link]
- Lindsay Meisel via Ava Women. When Does Implantation Occur? [link]
- American Pregnancy Association. Human Chorionic Gonadotropin (HCG): The Pregnancy Hormone. [link]
- New England Journal of Medicine 340(23):1796-9. June 1999 via Research Gate. Time of Implantation of the Conceptus and Loss of Pregnancy. [link]
- Kelly Sundstrom via Parenting. Is it Implantation Bleeding or Just a Visit from Aunt Flo?
- Snell, B. J. (2009, November 12). Assessment and management of bleeding in the first trimester of pregnancy [Abstract]. Journal of Midwifery & Women’s Health, 54(6), 483-491. [link]




My husband and I have been trying to have a baby for about 5 yrs, I have PCOS and my husband does have a low sperm count, I had Gastric Bypass surgery 10/2017 and have lost 60 pounds, I am now 197 at 5’9. So this month has been weird for me, the start of my last cycle was 1/6/2018 but on 1/30/2018 I started bleeding and mild cramps for one day. Noting since, I have been extremely tired and bloating and mild cramps, sore nipples, gas, stomach make a lot of weird noises. My cycles are normal, Im not sure if Im pregnant or not, my real cycle is suppose to start this week, I am super confused and very overwhelmed not sure what to think or even when to test?
Hello Jessica, take a pregnancy test 7 days after a missed period. Wishing for you all the best, however given your medical condition and your partner’s low sperm count you might have difficulties conceiving and might need help medically to accomplish this.
My Last period started on the 2nd of Jan my cycle is Usually 26days on rare occasions 28, I have noticed dark brownish discharge since yesterday the 28th mostly when I wipe after using the restroom. Been 24hrs now tried a dollar store kit and it read negative, did I test too early? Been having light cramps too
Hi U,
Well considering you said that you have a 26 day cycle, the 28th of January would have been the 26th day. You might have tested to early even if you are in fact pregnant, or it could be implantation bleeding. Light cramps could be both PMS, period or pregnancy. I would give it until a week later and take a test if you think you may be pregnant or consider it your period and wait until next month.
3 days late. 3rd day light spotting when I wipe. Itchy breasts before missed period. . My menstrual cycle is 26 days. Didn’t take any test but feels pregnant am I or is my period late.
Hello Joelia, in 4 days you can take a pregnancy test to confirm pregnancy.
Hey, usually I have a 28days menstrual cycle but lately it has changed to a 26days cycle . I have been trying to conceive for some time now. even had sex on my ovulation days but still nothing. went to my doc to examine myself and she said everything was fine with me. last month I menstruated on the 19th Dec, had unprotected sex on the 29th which was the first day of my unsafe period. my nipples are a bit dark and they hurt. but today the 14th Jan I started bleeding. what can I really do to get pregnant?
Hello None, see links below to help you with impregnation:
https://womanjunction.com/how-to-get-pregnant-guide/
https://womanjunction.com/importance-supplementation-pregnancy/
https://womanjunction.com/best-lubricants-support-fertility-couples-trying-get-pregnant/
Hello
I am very confused as to how this works I went to the doctor and did a blood test today and they informed me that I am +- 6 weeks pregnant I cannot remember when I started or finished my period in November I know I definitely had my period…. is there any way to find out or calculate when the baby was conceived?
Hello Stella, yes use the below link to find out when your baby was conceived. https://womanjunction.com/conception-calculator-find-your-conception-date/
Had my period dec 8th was about 4 days long. Then had sex the 16/17/19/22. 25 I spotted, 31 I spotted. On jan 3rd got what I think is my period. Was 2 days long off and on bleeding. Could I be pregnant? My periods have been about every 25/26 days
Hello Jo, the only way to know is to take a pregnancy test.
I am trying to fall pregnant and m now using my calendar, I’m 35 now and my last child is turning 5 19/01/2018. My period has being regular on every month however, sometimes 28days and at other time is more than 28days. Now, I’m planning for a boy, which peak days should I try.
Hi Faymary. There are no guaranteed methods to conceiving a boy. It’s really a 50/50 chance either way. However, there are people that swear by the Shettles method where there are certain positions that make having one more likely. But they say having intercourse as close to ovulation as possible can increase the chances because male sperm are faster moving than female. Again, though, it’s not a guarantee.
Hi me and my husband had sex nov 24 ,25,26 and dec 1,2,3,4 and dec 6&7 I had a period and it stopped.. my stomach is cramping and after that I took a pregnancy test and its negative ; and took a urine pregnancy test and its positive..could it possible for me to get pregnant?
Hi there Rhona, if the urine pregnancy test is positive then you are already pregnant. Congrats.
Hello I had my period on 30th Nov, and I feel so tired,I had cramping severally, feel waist pain, tenderness in breast, does it mean am pregnant
Hello Frebez, please take a pregnancy test 7 days after a missed period to confirm the same.
Hello my last period started 08/18 and I had sex 8/27 and 8/30 with guy 1 and 8/4 with guy 2? Ultrasound confirmed on 10/19 that I am 8 weeks and 6 days. Is it possible guy 2 is the father?
Hello None, use the below link to determine who the father might be: https://womanjunction.com/conception-calculator-find-your-conception-date/
To my surprise I see my period again on the 23 of November ended 27 I use my ovulation calender to get my fertile and ovulation day I make sex on the day is there any way to get pregnant apart from this
Hello Portable, just keep trying.
Hey i went to dominican republic to see my man on nov 29 had sex from nov 29 to Dec 10
My period was due on the 11 but i started to spot on dec 9 to 11 it stop and today dec 12 am spotting again what does that mean it never happen before
Hello Melissa, this could mean many things. Please wait to see if your period will come.
My period started on November 20 and ended on the 24th. I started spotting on the 27th and it only lasted one day. Then today Dec 4th size days later I am spotting. My husband and I hAve been trying to conceive for 14 months and I have never had spotting. What could my spotting be from because my period is supposed to come in 11 days.
Hello Kate, this could be implantation bleeding. Please take a pregnancy test if you have missed your period 7 days after the date it should return. All the best!
i had a regular period on sep. 12th, had sex on sep.23.. started what i thought was a period on oct. 9th…have completly missed my nov. period! i took a test on november 11th and it was neg. does it sound like im pregnant or just a fluke that i missed a period?
Hello Maggie, please retake a pregnancy test…accurate when taken 7 days after a missed period.
Delivered my son December 22 2016, I have breastfed him started solids 3 months ago. I have never had my period yet. I nurse him 7 x in a day with his solids. Than at night it is 2x before bed than at 11p.m I had unprotected sex on 11/07/2017 + 11/08/2017 started cramping on 11/11/2017- 11/18/2017 on and off with clear watery discharge. After this my breasts are sensitive to nurse my son. I pee alot lately. I took a hpt on 11/20/2017 faint positive went to go get blood test bfn. Took 6 hpt test still faint positive. I know with my son I cramped for a week on n off like I did this time n got the same test result until the 3rd week it came out a BFP. with him. What do I do did they do blood test to early???
Hello Nikki, a faint positive indicates a low positive which means you are still pregnant. Please see your doctor for full confirmation.
I start my period on the 31 October end 4 November then have sex 6,9,10,11,12 and 14 am having pain in my nipples for some days now which I think it will stop, it may be due to ovulation time or does it mean I am pregnant? Please kindly reply to my message today.
Hello Portable, yes once you had unprotected sex you might have conceived.
Hello portable I am exactly with you. Started by period October 31 end Nov 4 then had sex on your exact days. I have missed my periods and my nipples hurt. Did urine and blood test, both negative