When Does Implantation Occur?
When does implantation occur is a common question often asked by women trying to find out if they are pregnant or not.
Implantation mostly occurs around 6-7 days after fertilisation for most women. But it can happen as early as 6 days after conception or as late as 12 days after conception.
But for most women, It happens around 7 days after fertilisation.
Lets take a quick look on the implantation process and symptoms for a better understanding.
What is Implantation?
Implantation is the process by which a fertilised egg attaches itself to the lining of the uterine walls to grow, nourish and develop.
Fertilisation happens in the fallopian tube. After which the fertilised egg starts dividing into a ball of multiple cells known as blastocyst.
The fertilised egg then travels slowly down the fallopian tube to the uterus(womb).
It takes about 6-7 days after conception for the blastocyst to arrive in the womb.
When the blastocyst arrives in the womb, implantation may begin immediately.
The blastocyst attaches itself to the endometrium(lining on the inside of the womb) to grow and develop.
For some women, implantation may start late around 12 days after conception.
What is Implantation Bleeding?
Implantation bleeding is a light spots of blood. It's usually light pink or brownish in color and it is shed when the embryo attaches itself to the lining of the womb.
It is light, scanty and unlike your normal period which flows and soaks your pad.
Bleeding during implantation last for about 2hrs to 48 hours while your period last for about 3-5 days.
Most women get discourage when they see spots of blood on their pants or tissue paper. They think it's their period about to start.
The light bleeding is also accompanied by light lower abdominal cramping.
Spotting and cramping before period is one of the earliest signs of pregnancy.
Not all women experience bleeding during implantation. So don't give up yet, you may still be pregnant.
When Does Implantation most likely occur
Implantation most times happen around 7 days after fertilisation. But it can happen anytime between 6-12 days after fertilisation.
This is usually a few days to when your period is due. So it is not uncommon to mistake the spotting and cramping you have for a menstrual period about to start.
After a successful implantation, the level of human chorionic gonadotropin (HCG) hormone increases.
The HCG level continues to rise as you progress into the pregnancy up until week 11. It is produced by the cells in the placenta.
It is this HCG level that is detected by urine or blood pregnancy test to confirm pregnancy.
A low HCG level will result in a negative pregnancy test. This is why it is advisable to wait until you have missed your period to test for pregnancy.
Still not sure if implantation has happened or not?
Here are a few other symptoms:
- Light pinkish or brownish spotting or discharge
- Mild cramping known as implantation cramping
- Mood Swings
How to use an Implantation calculator
Another way to determine when implantation happened is by using an implantation calculator.
An implantation calculator works by calculating the date implantation occurred using either the day you ovulated or the first day of your last menstrual period.
Depending on the one your remember.