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You are here: Home > Fertility & Trying to Conceive > Conception - Implantation of a Fertilized Egg

Implantation of a Fertilized Egg

by Teresa Shaw
246 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 207 Comments
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Myah Apr 23, 2014 10:42:10 AM ET

I had my period on april 10, and i had unprotected sex on april 19. my boyfriend pulled out but at last minute, so if i could give a percentage of how much was inside it would be 90%. it's now april 23rd, and i'm having small cramps in my lower stomach but i don't know what to do? should i wait until my next period and see if i will have it or not?

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Guest Apr 16, 2014 01:46:15 PM ET

My last period was the week of feb. 23rd, 2014. i had unprotected sex on the 20th of march with my new partner. i didn't ever have a period in march so as soon as i realized, it was missed. i took 2 tests on 2 separate occasions. both of those were negative. i took another series of 3 tests last week and now they all say positive. can someone just let me know what day i made my child?

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Guest Apr 11, 2014 10:08:07 PM ET

Me and my boyfriend had sex on friday around 3am in the morning and my period was on the 9th. my period spotted and was watery pink, then it stopped. then it came and stopped around 3am and it turned red but it wasn't heavy. that morning it was a medium flow half of the day and today it's very light but only blood comes when i wipe. i have been feeling cramps. this is not how my regular period is. can someone please tell me if i could be pregnant. is this implantation bleeding because i have been feeling sick to my stomach and have headaches.

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Guest Mar 30, 2014 12:09:45 PM ET

I am having a little guys think cramping in my lower belly, but i have a little bit of brown in my pad. i don't know what it could be. i checked on internet and it says it's implantation but i want to be sure. what do you think?

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Guest Mar 30, 2014 09:29:43 AM ET

Hi selfie, my situation is the same as yours. i am so scared to test. i think i will monday morning if af doesn't come.

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Guest Mar 28, 2014 10:10:40 AM ET

Hi. i had a positive opk with a clear blue smiley face on the 17th, 18th, 19th and 20th. then, on the 24th, i had a slight pink spot mixed with cm and then no more. now, the last 3 days, (26th, 27th, 28th), i have had very painful breasts, mild cramping, nausea, the scent of food make me ill, on and off headaches and very tired. what i needed to know is if anyone could estimate when i actually ovulated so that i know when i can test for pregnancy? many thanks :)

Guest Mar 31, 2014 05:30:12 AM ET

I have also had a tiny amount of pinkish mucus yesterday (30th). anyone know whats going on?

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Selfie Mar 26, 2014 04:56:39 PM ET

I had unprotected sex on the 15th and then again on the 20th! i tested positive today on the 26th. i'm wondering which day did i get pregnant?

Guest Apr 3, 2014 08:48:50 PM ET

Probably on the 15th since it would be too soon to be pregnant from sex that occurred on the 20th. good luck.

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Guest Mar 14, 2014 05:06:34 PM ET

I had unprotected sex 2 weeks ago and now i am having light bleeding with cramps. i don't get my period for another week. could i be pregnant?

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WannabeMama Feb 20, 2014 04:56:19 PM ET

I'm 42 years old. i have never fallen pregnant. i was diagnosed with pcos in december. i was given clomid and now i'm on my second cycle. it's day 19 of my cycle and i have period pain type cramps. milder than normal though. i used opk's this month and practiced our baby making skills every two days as advised by the fertility expert, so the quality of my hubby's super sperm was not impaired! i got everything crossed that this is it! i found out that after the age of 42 i can't use my own eggs if i need ivf later down the line. so i'm hoping i can do this naturally. where i live the cut off for ivf on the nhs is 34 years. contrary to nice guidelines. i've written to the nhs formally asking for funding should i need it. the infertility network has awesome letters to write to the nhs and your mp. wishing you all babies galore.

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Nadi Feb 19, 2014 01:37:14 AM ET

I've been trying to conceive for the past year with my boyfriend and no luck. my last period started on the 18th of jan and ended on jan 23rd. i later ovulated from jan 27th to feb 2nd with my egg actually releasing on the 1st of feb according to my period tracker on my phone. i also marked the dates of when my bf and i had sex which was on jan 24th, 26th, 28th and feb 1st. those days we actually relaxed and didn't worry about getting pregnant. my next period was expected on the 15th of feb and here i am 4 days late. i had some mild cramping from my first late day until now making me think my period was coming on. but i have nothing but a white discharge that changes from mucus like to milky. i had that for about 2 or 3 weeks. i thought i was just ovulating that long which i found out it wasn't possible haha. i was googling my symptoms and i rounded up that i should wait another week to test. but curiosity killed that cat. i couldn't stand the wait. so i brought two home pregnancy tests just in case it was negative and then wait a week and take the other. i took the first and it was positive. i was in shock because i tried to conceive for what seemed like a lifetime to me and the one time i gave up it said positive. so i hurried and took the second test. now i have two positives and will be going to the doctors in the morning. yayyyy! besides that i had no other symptoms besides the mild cramping, peeing a lot when i barely had an appetite to drink or eat, and the discharge. wish me luck. good luck to those trying to conceive!!!!

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