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You are here: Home > Fertility & Trying to Conceive > Conception

Implantation of a Fertilized Egg

by Teresa Shaw |

When trying to conceive, it's sometimes hard not to scrutinize every sign and symptom you feel for possible signs of pregnancy. One of the most tell tale signs of pregnancy for many women is implantation, or when a fertilized egg, or zygote, implants into the lining of the uterus. Many women ask when does implantation occur, and what are the signs of implantation?

When Does Implantation Occur?

Implantation typically occurs 6 to 10 days after ovulation, or day 20 to 24 of a menstrual cycle. However, it can happen a few days earlier or later. In an average 28-day cycle, ovulation occurs on day 14 with the first day of a woman's period being considered day 1 in a cycle. Once fertilization occurs, the egg stays in the fallopian tube for three days before entering the uterus and begins to implant itself to the uterine lining.

Find out when implantation will happen based on your last menstrual period or ovulation date with our implantation calculator.

What is Implantation?

Implantation happens when a fertilized egg attaches itself to the uterine wall. Once fertilization occurs, the fertilized egg remains in the fallopian tube for 3 days. It then enters the uterus where it gets very close to the lining of the uterus (endometrium) and begins to invade this endometrium to implant.

What are the Signs and Symptoms of Implantation?

Implantation is usually a quite gentle process with very few symptoms that can be felt or noticed. Most symptoms are usually detected or diagnosed as implantation once pregnancy has been confirmed; that is, once you realize you're pregnant, certain symptoms you might have noticed a few days prior will match up to those common to implantation.

The following are some typical signs of implantation.

Only a positive pregnancy test or a blood test performed by your doctor can confirm that you are pregnant. Don't despair if you haven't felt or noticed any of these signs of implantation. Very few women actually notice implantation, and not feeling implantation does not mean that you are not pregnant. If you think you might be pregnant, be sure to make an appointment with your doctor to confirm a pregnancy.


Implantation calculator - Find out when implantation will occur if you conceived

Calculate your approximate ovulation date with our ovulation calculator

Do you think you might be pregnant? Find out your due date with our due date calculator.

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Showing 1 - 10 out of 245 Comments
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pee Nov 10, 2014 06:11:48 PM ET

I have a 31-33 days regular cycle. i was told my fertile day wouldn't be cd 14, but from 16-19 or 20. i had sex within those times and beyond, but i'm still not pregnant. i have done two tests, but both were negative. what could be the problem? i'm very worried. i need advice.

Guest Nov 20, 2014 04:00:52 PM ET

Every time you ovulate, your chance for pregnancy is only about 15% if you are having sex around that time. try bbt charting and opk tests, so that you have a more accurate idea of when you ovulate. good luck!

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nes Nov 10, 2014 05:15:43 PM ET

Hi. i have a question. once you get off your period, are you fertile?

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neicy Nov 9, 2014 10:38:46 AM ET

Hi my period was 09/14/14 and ended 09/20/14, now on 10/05/14. i started spotting when i wiped with tissue. the spotting brown lasted off and on until 10/08/14. my period is normally every 22 days. i always use my period tracker to see when my next period is. it says it's supposed to come on 10/05/14, but i only got spotting. i took a pregnancy test on 10/1/14, but it came back negative. could my spotting be implantation bleeding? i want to take pregnancy test today, but i don't. is it still too early for a positive pt?

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sadiya Oct 28, 2014 03:46:20 AM ET

My last period date was september 8th. yesterday, i had a small amount of bleeding. what does this mean?

Guest Nov 5, 2014 01:24:14 AM ET

It could be implantation bleeding. the best way to know is by taking a pregnancy test.

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ash Oct 9, 2014 09:43:29 AM ET

I had a tubal 14 yrs ago. this morning i woke up with a temperature, lower back ache, my uterus camping, boobs hurt, and i'm sweating. i'm also very tired. my lmp was 9/26/14. today is the 9th oct. could i be pregnant?

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guess Oct 7, 2014 02:07:10 PM ET

Hi. i had my implanon inserted in april 2011, and got it removed september 17 2014. i was spotting before i got it out, but then a couple days later my period was heavy. i had unprotected sex three times since the removal. now i feel pregnant.

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Angelbaby Oct 4, 2014 06:07:30 PM ET

Hello, i'm really confused and hope you ladies might be able to give helpful advice. i am on cycle day 31, and currently have not had a period, when i normally have regular or early cycles. i have had typical early pregnancy symptoms for the past week and a half; nausea, aversion to smells, breast tenderness, mood swings and yesterday evening i had 3 little spots of light pink blood, which was weird. i took two tests last week and they were negative. so now what??

Guest Nov 5, 2014 01:21:11 AM ET

I think it's best if you see a doctor, or try to re-take a pregnancy test just to make sure if you are or are not pregnant.

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tree Sep 30, 2014 04:27:55 PM ET

Hi i started my period on the 19th of this month, and had unprotected sex on the 21st. during my period, a week later, i went to the bathroom and had very light pink spotting on the toilet paper just that once. can anyone please tell me if that means pregnancy, or something else?

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Kate Sep 29, 2014 08:51:42 PM ET

My boyfriend and i had unprotected sex on the 17th the day i was fertile. my ovulation day was the 22nd, and i have been having cramps, lower back pains, and horrible headaches. what do i do?

Guest Nov 5, 2014 01:28:20 AM ET

Take a pregnancy test, or visit your primary doctor to see if you are or are or are not pregnant.

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yer Sep 29, 2014 01:34:09 AM ET

Hi. i need help!!!! i had a period on 08/19/2014. it lasted for 5 days. on the 09/19/2014 i went two restroom, wiped, and it was only a little brown. then, i did not have anything for about 3 days. then i had a little light pink blood, and than a couple day's latter had brown. was this implementation?

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