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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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From around the web


Showing 1 - 10 out of 241 Comments
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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??

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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?

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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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mel Sep 17, 2014 04:14:18 PM ET

I had several tests come out saying that i'm pregnant. then, i started bleeding today. does that mean i'm still pregnant?

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vibha Sep 16, 2014 01:04:58 AM ET

Hi. i'm trying to conceive and had a iui on 13th day of cycle. i have been feeling very sensitive in my breasts. today is the 24th day. should i wait for my period, or expect something good.

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Guest Sep 11, 2014 12:02:50 PM ET

So, on the 9th had sex yesterday the 10th (at night) i wiped after going pee and had bloody discharge. i'm not ttc. i have been having cramps since then. i know about implantation, but that doesn't happen until days later, and i'm having those symptoms now! i'm confused :/. oh yeah, my lmp was 8/25/14

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Guest Sep 2, 2014 01:58:18 AM ET

3 dpo, dull cramping on right side, 11 days until my period starts. could i be pregnant?

rickael Sep 3, 2014 03:12:24 PM ET

The same is happening to me!

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