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

Implantation of a Fertilized Egg

by Teresa Shaw |
315 Comments


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.

Resources

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.

8 Signs You May Be Pregnant

Early Pregnancy Tests Reviewed

hCG Hormone in Pregnancy

Trying To Conceive Message Board


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Comments


Showing 1 - 10 out of 262 Comments
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brittany Jan 21, 2015 02:01:32 PM ET

I might be pregnant. i had sex 8 days ago, last tuesday. is it possible to be pregnant this early? i think i ovulated when i had sex. i don't really know the guy, and now i might be pregnant by this guy. i am 23, still live with my mom, and doesn't know about it.

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Guest Jan 16, 2015 11:35:51 PM ET

On day 20 of my menstrual cycle, i experienced spotting and cramps that lasted a couple of hours. it has been 2 days since the spotting, and i have had extremely sore breasts to the touch, and they get heavy and feel full. also, i have been sleeping all day, not even knowing i was that tired. i took a pregnancy test 2 days after the spotting. it was negative. can someone please give any advice associated with this? thanks!

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t Jan 15, 2015 09:27:51 PM ET

I had unprotected sex on jan 5th, and my period came on jan 11th. could i be pregnant?

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saima shakeel Jan 13, 2015 12:05:37 PM ET

Hi. i had sex with my husband on saturday and sunday, and my periods stopped 17 days ago. now, i feel pain in my uterus and my back. could it be possible that i am pregnant?

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Guest Jan 5, 2015 08:20:11 PM ET

I'm really nervous. i had unprotected sex 3 times after my period ended. now, i'm having mild cramping, and sometimes i feel like i'm going to be sick, but i never throw up. could i be pregnant?

Sophie'sworld Jan 9, 2015 03:03:55 PM ET

Well, do you commonly have these symptoms before your period begins? i normally have cramps, dizziness, headache, and all the sickness before my period begins so it is hard for me to identify if it's a pregnancy sign or just premenstrual symptoms. so, i suggest you wait until you miss your period, and if you wanna be sure, take a pregnancy test, but make sure you don't take it too early.

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Jenni Jan 1, 2015 08:02:41 PM ET

Ok i am nervous and scared because my last period was on november 17th and i didn't get my period 2 weeks ago. but, i did have unprotected sex on the last day of my last period. yet, when i went to the doctor, they didn't find anything in my uterus and i never had implantation bleeding. what could it be? please help.

Don't stress Jan 12, 2015 10:53:18 PM ET

If you had ups the last day of your period. you wouldn't have ovulated yet. ovulation doesn't occur until about day 14 of your cycle. often your mind can trick your body into thinking it's pregnant, causing your body to delay your period for up to a month.

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Jenjen Dec 31, 2014 05:11:01 PM ET

Is it possible that an egg could have been fertilized, but then did not implant itself properly to the uterine wall? if so what would one feel? i am on day 35 of my cycle with bad cramping over the last 7 days. all pregnancy tests come back negative, and i just started a light spotting yesterday. but, it's so light. i have two small ovarian cysts right now and i think that's what's been causing me issues. i plan on making a doctor's appointment after the new year, but i'm so stressed out over it all. any advice would be appreciated.

Sophie'sworld Jan 9, 2015 02:57:48 PM ET

Well, do you have a normal cycle or is it common that your period gets delayed? if you think it is not normal then go and see a doctor especially if you have ovarian cysts. don't be scared. it is better to have your cysts monitored. i have a tumor and i learned to accept it. i used to be scared seeing a doctor, but i am okay now. i hope things will turn out well for you.

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Guest Dec 29, 2014 02:46:49 AM ET

I'm confused! on the 9th of december, i took an ovulation test and it was positive. i had unprotected sex the next day. i took a pregnancy test on the 20th, but it came out negative. i was supposed to get my period on the 23rd, but today is the 29th, and i am 6 days late. i have not taken another pregnancy test yet. is there a possibility of maybe getting a positive? oh, and by the way, since the 19th, i've been having cramps as if they were period cramps, but still no period. plus, i have had unprotected sex a couple times more within the past couple weeks. help please!

Guest Dec 31, 2014 08:29:35 PM ET

Your cycle sounds really close to mine. you probably took the pregnancy test too early. take another pregnancy test.

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Leya Dec 24, 2014 04:32:24 PM ET

I had my period on dec 14th, and had sex on dec 21st. i woke up on dec 22nd with lower back pain. then on the 23rd and 24th, i was really tired and sleepy. i slept almost the whole day yesterday. could i be pregnant?

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louise Dec 20, 2014 05:48:58 PM ET

Ladies, sometimes being so desperate to find out whether you are pregnant so early after you think you have ovulated whether the pregnancy is wanted or not. just remember your mother waited 9 months for you. the joy you will feel when you find a much wanted positive. you will keep testing over and over just to make sure it is. patience, otherwise the next 8 and a half months will be the longest you've ever experienced.

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