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Implantation Calculator

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Implantation occurs when a fertilized egg implants itself to a woman's uterine wall. Use this implantation calculator to determine when implantation most likely occurred based on the days you ovulated. If you know the day you ovulated, please enter the information below to produce more accurate results.

If you know the date you last ovulated, please enter it here.

When did your last menstrual period start?

How many days is your cycle usually?


Impantation and the Early Signs of Pregnancy

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Very Early Signs Of Pregnancy

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Ask a Question on the Trying to Conceive Message Board


Implantation Discussion


Showing 1 - 10 out of 191 Comments
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Guest Nov 21, 2018 04:16:02 PM ET

Hi there, i need some help. i had my last period on the 22nd of october and i was using this app to track when i was to ovulate. me and my boyfriend tried everyday for a week around the day of ovulation. this was from the 2nd-8th of november. on the 17th of november i started bleeding, but it was lighter than normal, and was a pinkish color. it lasted for three days and on the fourth day it was a brown discharge. i'm just wondering if anyone knows what this could be as i've never experienced a light period and it was few days early as well.

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Guest Aug 26, 2018 08:27:38 AM ET

My periods have always been regular and on time, the 7th of each month, lasting from 4-5 days. this month my period did not come on time and i didn't have any intercourse in the past 3 months. so pregnancy at that point was impossible. i had intercourse with my boyfriend the 16th and 18th of this month. and just a few days later i started having some light bleeding, more like spotting just a few drops, never enough to fill or soak a pad for 4 days on and off. the spotting started light pink, the second day it was dark red, and day 3&4 it was brown. i've been experiencing nausea, loss of appetite, and headaches. has anyone had something similar to this happen to them? could it possibly be pregnancy symptoms? or am i just loosing my mind?

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Shavon Jul 29, 2018 07:16:48 AM ET

They say i conceived march 30 but, i only had sex april 12. it is confusing.

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Guest Jun 28, 2018 01:04:53 PM ET

I came on my period around the 24 of may then started spotting around the 3rd of june for a hour and here it is june 28th and i haven't came on yet. i took 2 pregnancy tests and both came back negative.

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Shaniqua Jun 13, 2018 06:20:13 AM ET

I had my last period on may 23,2018. and i had unprotected sex on june 9,2018. can anyone looking at me know if there is anyway i could be pregnant? i am feeling so sick i am bloated nauseated sore nipples swollen breasts headaches and had a little spot of bright red blood and nothing else. i was supposed to finish my period but it went away. some one let me know. i am also having constipation issues.

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Das Jul 18, 2017 10:39:28 PM ET

I had unprotected sex with my friend april 28,29 then had unprotected sex with my ex may 2,3. i'm 12 weeks. my lmp was april 25 . my due date is 01/30/18. who is the possible father?

lrebirth06 Aug 9, 2017 06:37:35 PM ET

More than likely your ex is the father.

deedee Sep 20, 2018 08:05:11 AM ET

Your friend more than likely

sandra Oct 22, 2018 03:53:23 PM ET

Your friend

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Mercedes Jun 26, 2017 09:18:12 PM ET

My lmp was may 10th , and i had sex may 18th how far along am i ? i went to my obgyn but it's showing i'm 6 weeks and 5 days . but that isn't possible because i didn't have sex the week of my period . please lmk

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AMA Jun 12, 2017 08:21:45 AM ET

I had my last period on 5th and ended on 8th. when is my next period starting? my guy and i made up, and untill now i have not had it.

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Guest May 26, 2017 01:22:43 PM ET

Hi i would like to know when did i conceive and when did implantation occur ,my babys' due date is 18 -20 july 2017 .

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Guest Apr 20, 2017 08:39:06 PM ET

I had a short one day period on april 8th and normally it is 2-3 days long. is this implantation bleeding?

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