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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 235 Comments
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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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Guest Aug 25, 2014 10:13:18 AM ET

My last period was 28 july, and i had unprotected sex from the 11th to the 15th of august. now feel lower abdomen cramp.

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MiMi Aug 12, 2014 08:30:19 AM ET

Well this might be gross, but i had unprotected sex while on my period and my period last only 3 days. we had sex on the 2nd and 3rd day. could i possibly be pregnant? we've been trying for the past 4 months.

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jm Jul 23, 2014 03:27:37 AM ET

I feel back pains, and swollen breasts two weeks before my period come for two days only, and the pains disappear. am i pregnant?

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gt Jul 16, 2014 07:19:02 AM ET

Hi i'm new here i've started taking fertomid 50mg. my lower belly is in pain and i don't know why. apparently i've been diagnosed with an ovarian cyst. i don't know what to do because it's paining. does anyone with the same problem pleas help?

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Guest Jul 11, 2014 11:59:04 AM ET

I'm usually pretty good at telling when my period is about to come, with slight cramping lower back pains, emotional and sensitive breasts (every time). my period isn't due till around the 20th, but i'm experiencing lower back pains, cramping and heavy discharge. i tested for stds and infection all were negative. could i be pregnant?

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ida Jul 3, 2014 11:44:43 AM ET

My lmp was around may 10th, and i had some spotting on june 1st. i missed my june af, and am now spotting dark pinkish to brown. hpt comes back negative even though i have an expired implanon still in my arm. i'm so confused. my periods had regulated after the implanon expired and i am now going thru this.

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