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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?


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Ask a Question on the Trying to Conceive Message Board


Implantation Discussion


Showing 1 - 10 out of 173 Comments
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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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Guest Apr 10, 2017 04:05:11 PM ET

I had intercourse on feb. 20th. i am now pregnant and need to know if it's possible to be pregnant from feb. 20th with a conception date of march 5th.

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Flores Apr 10, 2017 09:19:07 AM ET

I'm trying to have a child. i've been active with my nd since february 4th, i had my period march 19th, (28 day cycle) i've been feeling sick and my stomach has been hurting . is it possible, i could be pregnant?

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Ladybug Apr 6, 2017 09:00:00 PM ET

Hello, could i be pregnant. been tubal 13 years. spotting 6 days before cycle. now i have 3 days before my cycle. help anyone

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Guest Apr 3, 2017 04:11:18 AM ET

I had unprotected sex on january 2nd, my period started on january 11th, (can't remember how long it lasted) but i didn't have a period in february...so could i be pregnant???

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Guest Mar 28, 2017 08:04:08 PM ET

I had my period march 11th and it ended on march 18th. i have a period tracker on my phone and it says my fertile window is from the 26th of march until the 31st is my predicted ovulation day. i have been having unprotected sex. do you think i could be pregnant?

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Bella Mar 27, 2017 07:26:22 PM ET

I had sex on the 17th and ovulation was the 19th. i should be ok, meaning i cant be pregnant.

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Melanie Mar 21, 2017 02:24:25 PM ET

So i'm irregular and my last menstrual cycle was february 16th and i havent started yet. i took a pregnancy test today and it came back negative. i've been having unprotected sex . can i still be pregnant?

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