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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 impantation most likely occured 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

Implantation of a Fertiized Egg

8 Signs You May Be Pregnant

Very Early Signs Of Pregnancy

hCG Hormone in Pregnancy

Ask a Question on the Trying to Conceive Message Board


Implantation Discussion


Showing 1 - 10 out of 189 Comments
Add Comment or question.

Shavon Jul 29, 2018 03:16:48 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 09:04:53 AM 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 02:20:13 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 06:39:28 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 02:37:35 PM ET

More than likely your ex is the father.

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Mercedes Jun 26, 2017 05:18:12 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 04:21:45 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 09:22:43 AM 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 04:39:06 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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keesha Apr 13, 2017 05:35:01 AM ET

So i had sex on the 2nd of march, and then i started to bleed on the 3rd. then it was gone on the 4th for that whole day. then it started on the 5th-the 10th. it stopped and then it started on the 28th-31st.

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Conceited Apr 11, 2017 04:39:17 PM ET

My last period was on march 10th, and i had unprotected sex on the 18th and 25th of march. it is april 11th, and i haven't had my period. could i be pregnant?

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