How Long After Conception Does Implantation Bleeding Occur?

When you are trying to get pregnant, you are always looking for clues to let you know that your hopes and dreams are on their way to being reality.

One of the initial signs that women look for, as a sign that they are pregnant, is implantation bleeding.

What Happens Before Implantation

Before implantation bleeding is a possibility, there are several steps that need to occur in your body.


On average, your ovaries will release an egg (ovulation), into your fallopian tubes, 14 days before your period is due. Your egg will survive 12 to 24 hours after ovulation, and then will start to disintegrate, making conception impossible.


If your timing for intercourse is good, there may be a lucky sperm waiting to fertilize the egg (conception) upon release. Healthy sperm can survive up to 5 days after ejaculation in the woman’s reproductive tract. Optimally, having sex, as close to ovulation as possible, will increase your chances of conception.


Once conception has occurred, the fertilized egg, will travel down the fallopian tube to the uterus. As the egg is traveling, the cells will continue to divide and grow in size. When the egg arrives at the uterus, it will attach to the uterine wall (implantation) and start to produce the hormone that pregnancy tests detect, hCG (Human Chorionic Gonadotropin). The time required for the egg to travel to the uterus and implant is usually between 7 and 10 days.

When the egg implants, some women experience implantation bleeding. You may notice a small amount of blood when you wipe, after using the bathroom.  The blood is typically a light pink or brownish tinted color.   The amount is much less than when your period starts. When the egg implants in your uterus, it develops a layer of cells, trophoblast, which surrounds the egg. The trophoblast provides nutrients to the growing egg by burrowing into the uterine wall. As it pulls the egg into the endometrium, a small amount of blood can leak into the uterine cavity, causing implantation bleeding. Implantation bleeding does not occur with every woman.   Usually only about 30% of women will experience implantation bleeding.  You will usually see implantation bleeding 4 to 7 days before your period is due if you are one of the 30%.

  • Courtney

    Had light period aug. 3-7 did the deed the 9th and of course the 14th (at midnight) which are my most two fertile days.. Well yesterday I wiped an there was light pink and now there is brown discharge not a lot just a little when I wipe now today the brown discharge is still light but every now an then it’s a little more than it goes back I light again! I’m not suppose to start until the 26th what could this possibly be??

  • Courtney

    For the past two months I’ll have a short light period around the first week of month but I’ll have my regular heavy bleeding at the end of month like normal. So I don’t know if the brown discharge is from that but I did have sex the 9th and 14th at midnight which the 14th&15th are my most fertile days. If I’m pregnant it would of happen on the 9th day before ovulation. What do you think is going on with me??
    Bf an I have been ttc for three months now and I’m getting very anxious!

  • deb

    I started what I thought was my period on July 23rd it only lasted 3 days and ended on a Friday then on the following Wednesday I began spotting now a week in a half later 10 days before my period is due I got a positive pregnancy test, is this normal or could I be farther along than I think?

  • Vickie B.

    Unfortunately, nine days before ovulation isn’t going to get you pregnant. Sperm can survive, at most, 5 days after ejaculation. It sounds like a visit to your doctor is in order to see if they can find out what is going on. It could be that you have a hormonal imbalance going on.

  • Vickie B.

    Well, it would seem that you would be farther along than you think. It is very rare for a pregnancy test to be able to pick up pregnancy that early on. Most of the time, you can get accurate results at about 4 days before your period is due.

Last modified: June 1, 2014