Can Implantation Bleeding Be Heavy?

When a woman becomes pregnant, the egg becomes implanted in the wall of the uterus. Some women may feel a sudden jolt of pain or cramps when this occurs, and bleeding is possible. Throughout the menstrual cycle, vaginal discharge and bleeding are normal. When these occur at the wrong times of the month or in abnormal amounts, it can be a sign of something more serious. If you believe that you could be pregnant and just experienced spotting, you may want to take a pregnancy test. If the test comes back negative, you may have to wait a few weeks for a positive result or you may want to consult with the doctor to figure out the cause of your bleeding.

How Heavy Can Implantation Bleeding Be?

For most people, implantation bleeding does not occur or it is extremely light. Although it is normally just spotting and extremely short, there are millions of women who have had heavier, more intense implantation bleeding. Depending on your hormones and genetics, implantation bleeding can last for a few hours or a few days. Often, it will occur on and off for several days before stopping on its own. Although it is normal for it to last certain amounts of time or be lighter, there are no rules for how your body specifically will handle implantation. In some cases, heavy implantation bleeding can last for up to four days.

When to Get Medical Help

It is normal to have implantation bleeding for a short period of time, and it is generally light. Although even heavy implantation bleeding is considered normal, there are some symptoms that you should watch out for. If you notice any of the following symptoms, you should make an appointment with your doctor or seek immediate medical care because it could be a sign of a more serious problem. Heavy implantation bleeding can also be a sign of a miscarriage, so you need to make sure that you get medical help.

  • Post menopausal bleeding
  • Pathological spotting can be a sign of health conditions like endometriosis, uterine fibroids or cancer in the reproductive system.
  • Light-Headedness
  • Extreme Pain
  • Fatigue

The Difference Between Implantation Bleeding and Your Period

Think of Your Timing

Normally, the menstrual cycle can vary from 24 days to 40 days. On average, most women have a 28 day cycle and ovulation occurs 14 days before your period is expected to occur. When you conceive, it is always around ovulation. The egg is only present for 12 to 24 hours after ovulation, so fertilization must occur in this time period. Once the egg is fertilized, it implants on the wall of the uterus about 10 to 14 days later. When it implants, you may experience other symptoms. Many women who experience implantation bleeding do not realize what they are experiencing, since implantation occurs close to the time when they woman would normally start her menstrual cycle. If you do experience bleeding prior to the time that your period normally starts, it could be a sign of implantation.

How Does It Look?

The color of the blood during implantation and your period varies drastically. When you have implantation bleeding, it will generally be extremely light and you may only need a panty liner. Often, women only experience spotting at random or a single incidence of spotting.

When you have implantation bleeding, it will normally start out looking pink or brown before it turns into a darker color. This happens because it takes longer for the blood to travel through the vagina and the uterine walls. If the blood is from your menstrual cycle, it will normally be red in color and become heavier as time progresses instead of stopping.

Consider Your Symptoms

When you have your period, you normally experience cramps and similar symptoms. With implantation bleeding, you might not experience any symptoms or you could experience some cramping. Some women have reported experiencing symptoms like nausea, bloating, swollen breasts, increased basal body temperature, tender breasts and nausea. Symptoms that are normally considered a sign of pregnancy like increased sensitivity to smell, increased urination or fatigue are also considered signs of implantation bleeding.

By paying attention to your symptoms, the length of bleeding and the intensity of bleeding, you can figure out if you are having your period or implantation bleeding. If you think that your bleeding is heavier than it should be, make sure to get medical help because this could be a sign of a miscarriage or another health condition.


  1. Hi my first day of my LMP was February 4, 2017. I’ve had unprotected sex multiple times since but only once in the ovulation window. Mostly afterwards. My period was expected to come on the 4th of March, however on the 24th I began spotting, (brownish pink color) which has never happened before a MP before. On the second day the bleeding looked a lot more like period blood, however it’d stop for a few hours and then come back. Today (day 4) I am completely dry other than a tiny drop of brown on my pad this afternoon. With it being 20 days late, do you think this could be my period or implantation bleeding? I did have sex just 7 days before! but my period was already 13 days late.

    • It is possible that you ovulated early, late or even ovulated twice last month. Since it is already so late, the best thing that you could do right now is to take a pregnancy test and find out for sure. It is already late enough for the test to be accurate, so it would be an easy way for you to know for sure.

  2. Hello,

    My last period started on March 15, My ovulation window is like between 24-30. My husband and I had sex on the 24 and 26. Today is the 28th and I’m having some heavy bleeding with clots !! I also started spotting brown/clear discharge on the 27 early that morning and it stop for the rest of the day and then when I woke up the 28th I had started some heavy bleeding !! I’m also cramping and having backache, headache and some dizziness.Is this normal ? Can it be that I’m having implantation bleeding or a chemical pregnancy? Need help understanding what’s going on !!! Thank you !!

    • Your menstrual cycle may be off this month, or it could be an early miscarriage. Implantation bleeding is normally not that heavy though. The bleeding could also be cause by a condition like PCOS or endometriosis, so you should probably go to your doctor to figure out what is going on with your body and get checked out. Good luck, Angelina!

  3. Hello, I have been off the depo provera shot for about a month now and yesterday I experienced a lot of blood but today I have nothing. I have been having a lot of unprotected sex and I’m just wondering why I only bled for one day?

    • Your body may just be trying to adjust to the difference, so it could just be an irregular menstrual cycle. You could also take a pregnancy test just to be sure that it is not caused by a pregnancy.

  4. Hi,

    My last menstrual period was on February 28th and I have a 29 day cycle. I ovulated on March 15th, my husband and I had sex every day the 5 days before my ovulation (some days more then once) and also had sex on ovulation day and few days afterwards as well. Then 10 days post ovulation I started spotting light pink, and then next day it increased a little more and on the 3rd day it was a little brown as well with pink. Than it just got a little bit more redder and more then spotting. Now at 13 days post ovulation I’m still spotting but it’s back to light spotting. My period is due tomorrow and I took a pregnancy test yesterday and it was negative. Could this be my period coming early? Or implantation bleeding or a miscarriage? I have had 2 full term pregnancies in the past and don’t ever remember anything like this happening, but I know it’s also different with every pregnancy. Any help would be greatly appreciated as I’m so confused with what’s going on. Thank you!

    • You may just be having irregular bleeding before your period. It could possibly be implantation bleeding, but the only way to know for sure is to get a positive result on a pregnancy test. Wait a few more days and then take a pregnancy test again to find out for sure. Good luck, Mandy!

  5. Hello

    My menstrual cycle was March 4th 2017 and ended on March 9th 2017. I used a fertility app that said my ovulation date would be the 17th. I had intercourse on the 16th. On Saturday the 25th i saw some spotting and now today the 27th and yesterday the 26th i have had light flow and cramps. Can i be pregnant??

    • It is possible. The only way to know for sure is to wait until after your period was supposed to start and take a pregnancy test. Your period could just be unusually early this month, or it could be unusually heavy implantation bleeding. Either way, the only way to find out for sure is to wait until your period was supposed to start and take a pregnancy test. Good luck, LaTresa Robinson!

  6. Ovulation was on the 16thof march, me and my husband had unprotective sex the 12th-15th, some days more than once, his sperms released everytime… well yesterday I wiped after using the restroom, it was very light, watery and bright next predicted period isn’t till the 31 of march, so I cleaned up, and put a tampon in, stayed light for a few hours then I went to work on 3rd shift gas station and started to bleed heavier as I worked.. I’m kinda impatient because I have lost 2 already and don’t want to get excited for a dreamed for pregnancy, if the heaviness is a miscarriage.. I worked 8 hours.. change the tampon once at work, came home and was using the restroom, went to pull my plug and it was drenched in a dark light textured blood, but there are no clots at all, after I cleaned myseld up before I put a new tampon the blood on the tissue WAs bright like that the start of the Strange spotting. My periods are normally spot on. But I should add in my past I have had many issues with endometriosis and cyst in my past… pregancy?miscarriage?early period? Help please. Thanks

    • Your period may just be a bit earlier this month. Cysts and endometriosis can both cause menstrual irregularities, so the slightly different timing may not be anything to worry about. It probably is not implantation bleeding that you are experiencing–it is most likely just your normal menstrual cycle. You can always take a pregnancy test just to be sure though. Good luck, Katy!

  7. Hi
    My last period date was 9 feb and on 16th march i took a pregnancy test at home and it was positive.but on 24th i suddenly started bleeding with light brown colour.and i called my doctor and he advised me to do an ultrasound.where i was suppose to be 6 weeks pregnant but the report was completly negative.i was told that in report there was not any visible symptoms of a baby,so you have to wait for 15 days more and do one more ultrasound.but today is my second day and i am still having light bleeding.i am so much worried plzz help me out.15 day is too long to wait for the result.

    • While it may be emotionally draining to wait, it is all that you can do right now. You may have had an early miscarriage, or there may not be a problem with the pregnancy. As hard as it is to do, all you can do right now is wait another two weeks before having another ultrasound. In the meanwhile, take care of yourself, eat healthily, get enough rest and try to relax as much as possible. Good luck, Jinu!

  8. Hi,

    My last menstrual period was february 14,2017. My fiancee visited me from March 11 to the 23rd. Yesterday March 24 I experienced a dark brown disgharge with cramps. It’s not a lot but it’s there. Ever since me and my fiancee made love with no protection or birth control while he is still here i’ve been feeling tired and sleeping a lot. I’ve been peeing a lot as well. Then march 25 i woke up from a nap with heavy bleeding, looks like mestrual period. I just want to ask if this means 100% sure im not pregnant and this is not a bad case of implantation. Thank you so much!

    • It could be either. Your menstrual cycle was rather long this month, so it could even be an early miscarriage. The best thing that you could do right now is to take a pregnancy test to find out for sure. You can get them cheaply at any dollar store, so it would be worth it. You might have just had a late period this month, but it is the only way for you to find out for sure. Good luck, Dianne!


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