Bleeding During Pregnancy – 6 Causes

Bleeding During Pregnancy

It can be a very scary time if you start bleeding during pregnancy. However it’s important to know that blood loss doesn’t always mean you could be experiencing a miscarriage.

Bleeding during pregnancy, especially during the first trimester, is more common than you might think. According to the study patterns and predictors of vaginal bleeding in the first trimester of pregnancy, around one-fourth of study participants reported bleeding during pregnancy. Eight percent of women reported heavy bleeding. Most incidences occurred between weeks five and eight, and in most cases, lasted no more that than three days.

Of the women who experienced bleeding during pregnancy, 12% percent of women experienced a miscarriage compared to 13% of women who did not bleed. They cited fibroids and prior miscarriage as maternal characteristics associated with bleeding.

While most women will have a once-off bleed, a small percent may bleed throughout their whole pregnancy. This may be in the form of spotting, streaking, or period-like blood loss.

Do I Need To Tell My Doctor Or Midwife?

All bleeding during pregnancy should be reported to your doctor or midwife. Any passage of blood from the vagina of a pregnant women before 24 weeks will be termed a ‘threatened miscarriage’ or ‘threatened abortion’. After 24 weeks its termed an ‘ante-partum haemorrhage’.

You especially need to see a doctor or midwife within 72 hours of any bleeding if you have a rhesus negative blood group (e.g. O-, A-), to see if there has been a possible mixing of yours and your baby’s blood. This results in the rhesus negative body producing antibodies against positive blood (which is the more dominant, likely blood group that your baby will inherit – but of course it’s unknown until birth). It doesn’t have any bearing on your first pregnancy, but in subsequent pregnancies, antibodies will attack what it thinks is foreign matter. See our article, Rhesus Negative Blood Groups In Pregnancy for more information.

Below is an explanation of some of the more common reasons for bleeding during pregnancy, and as you will read, its not always sinister. If the bleeding is accompanied by strong cramping, speak to your doctor or midwife asap. Some mild cramping/stretching sensations can be experienced in a healthy pregnancy though.

Possible Cause #1: Implantation Bleeding or Streaking

When a fertilised egg attaches to the uterine lining, this can result in light spotting or streaking (streaks of blood). Usually this only lasts a day or two and occurs during the time between implantation no longer than when your period was due (some women mistakenly think they have just had a light period). Implantation bleeding is usually bright fresh blood like that which you would expect to see if you cut your finger. It can also be in the form of a pink mucus stain. However do mention it to your carer for safe measure.

Possible Cause #2: Breakthrough Bleeding

Some women experience what is known as ‘breakthrough bleeding’ at the times when your period would have normally been due. So this would be at 4, 8 and 12 weeks of pregnancy. It is often accompanied by the feeling that you would normally associate with your period being imminent i.e. back ache, cramps, a heavy sensation in your pelvis, feeling bloated and ‘off’. Of course the period doesn’t arrive (even though you feel like it will) because you are actually pregnant! During pregnancy, hormones prevent your period from occurring. Sometimes the hormone levels are not yet high enough to stop your period and therefore you have this breakthrough bleeding. It can last for around three months – after this time the placenta begins to take over hormone production from your ovaries. Some women may experience breakthrough bleeding throughout the whole pregnancy and have healthy babies, under the close watch of their carer.

Possible Cause #3: Threatened or Actual Miscarriage

Studies indicate that around one third of pregnancies end in miscarriage (the medical term is spontaneous abortion) but don’t despair – these figures refer to the first 12 weeks of pregnancy, including very early miscarriages that occur before you even realise that you are pregnant. Often this is a result of a damaged fetus – your body may reject a pregnancy that is unable to survive its complications.

Once you have reached the 14-16 week mark you can be fairly sure that your pregnancy is safe. It’s probably not such a bad idea to refrain from telling the world you are pregnant until you get to the 12 week mark for this reason. Although you might be busting to share your wonderful news, it can be very distressing to have to tell the world again if you lose the pregnancy. Sometimes sympathy is comforting but sometimes it can be overwhelming when you are grieving for lost dreams.

Common signs of miscarriage include bleeding (being most common), cramping, backache and stomach pains. Women commonly say that they no longer ‘feel pregnant’ when they have miscarried and are bleeding. The signs of pregnancy disappear, no more nausea, sore breasts of bloated tummy. If you are bleeding and feel like this then chances are that you have lost the baby. If you are bleeding but still feel pregnant then the chances are very good that the bleeding is just a scare and the little one is hanging on in there. An ultrasound will usually be reassuringly normal.

It is possible to miscarry without any bleeding, which is known as a ‘missed abortion’. The fetus dies but is retained by your body. The signs of pregnancy would definitely have disappeared if this happens but the absence of a heartbeat would only be detected on ultrasound. You may need a curette to clear out the uterus.

For more information, see our article, Miscarriages – Saying Goodbye Before You’ve Said Hello.

Possible Cause #4: Bleeding After Sex

Bleeding after sex is one of the most common causes of bleeding during pregnancy. This is completely harmless and is caused by increased blood supply and softening of the cervix. Although this form of bleeding is not serious, you should always report this to your carer. Be prepared when you phone the maternity ward for the very personal question, “Have you recently had sex?” It’s a bit embarrassing but a common reason for bleeding, so it’s the first question midwives ask women who phone with vaginal bleeding. You do not need to cease love-making but you may need to reassure your partner that he’s not hurt the baby, who is safely protected in your uterus, well above the vagina.

Also see our article on Bleeding After Sex During Pregnancy.

Possible Cause #5: Ectopic Pregnancy

An ectopic pregnancy occurs when your fertilised egg implants itself outside of the uterus, usually in a fallopian tube. You may experience severe pain down one side of your abdomen, or generalised pain which doubles you over, you may feel faint and nauseous. The pain may suddenly disappear if the tube ruptures but it will return within hours/days and you will feel really unwell.

This is an emergency situation as an ectopic pregnancy can rupture the fallopian tube causing internal bleeding, damage to the tube and maternal collapse. Your fallopian tube may need to be removed along with the pregnancy but this does not mean you will have trouble conceiving in future provided your other ovary and fallopian tube are healthy.

For more information, read our article on Ectopic Pregnancy

The next question you will be asked if you phone to report a ‘bleed’ is “Have you had a scan, and was the placenta situated normally?”

Possible Cause #6: Bleeding From The Placenta

Painless vaginal bleeding can be from an abnormally placed placenta. Sometimes the placenta implants itself very low down on the uterine wall, occasionally right over the cervical canal. This is called placenta praevia and it occurs in about two percent of women. Placenta praevia will inevitably result in a bleed at some point in your pregnancy, usually after the 20 week period. There are differing degrees of severity of this condition but all will require repeat ultrasounds to accurately diagnose it. This condition may require bed rest, an induction or a Caesarean if it remains over the cervix in the remaining weeks of pregnancy to prevent your baby being put at risk.

Another cause of bleeding later in pregnancy is placental abruption (which occurs in approximately one in 200 pregnancies) where the placenta partially or completely separates from the wall of the uterus. Symptoms can include generalised severe pain and heavy bleeding. The blood may be seen by you or concealed in the uterus which will be tense, tight, hard to touch and very painful. If you smoke, have high blood pressure, kidney problems or pre-eclampsia, you are more at risk. It requires urgent admission to hospital and depending on the severity of the bleeding, you may either be put on bed rest, be induced or have a Caesarean. To find out more about low-lying placenta and placenta praevia read our article HERE.

What Should I Do If I Experience Bleeding During Pregnancy?

If you are over 20 weeks of pregnancy, seek medical advice immediately.

Do not use tampons if you are bleeding during pregnancy, always use pads. If the bleeding is light and you have no pain, in the first instance, contact your midwife or obstetrician to discuss the next step.

Once you’ve had it checked out by a medical professional, you could also seek out an experienced acupuncturist who is a specialist in fertility/pre-natal care, as there are some points they can work on to help you with bleeding and energy in that area. Acupuncturists work with patients who have had recurrent or threatened miscarriage – so might be worth a try – it is a safe, natural and healthy option.

If the bleeding is heavy (i.e. running out and you are passing clots) and the bleeding is accompanied with stomach cramps, backache and period type pains, contact your hospital immediately. While this is understandably an upsetting time, try to remain as calm as you can – remind yourself that bleeding can occur in pregnancy. Know that it is your blood, not the babies blood that you are seeing and that it is quite possible to continue on with a healthy pregnancy.

Don’t be surprised if the advice you receive for early bleeding (before 12 weeks) is to just watch and wait.

What If I’m Experiencing A Miscarriage?

If you are experiencing a miscarriage, unfortunately nothing can prevent it from occurring. Whilst it is very disappointing and upsetting, there is nothing you can do but to take care of yourself emotionally and physically. Know that you are not responsible for a miscarriage happening, and you would not have done anything to cause it. These things can help you to feel more comfortable physically (but cannot prevent a miscarriage from happening) are:

  • Bedrest
  • Panadol/Panadiene/Naprogesic for the cramps
  • Hot water bottle for your tummy
  • Tea and support from your partner

You may pass the developing fetus and tissue whereby the bleeding will then cease. Should you continue to bleed you will need an anaesthetic and a curette to ‘clean out’ your uterus.

However, remember that the majority of bleeding in early pregnancy settles spontaneously and the pregnancy continues unharmed.

Have you experienced bleeding during pregnancy?

Share your stories and experiences below in the comments section.

Last Updated: April 2, 2015


Kelly Winder is the creator of, a doula, writer and mother to three awesome children.Currently she's travelling the world for 12 months with her partner and children, and hopes to inspire more families to do the same.


  1. I had a tubal ligation after my last almost 3 years ago. My periods were normal. Then I missed 3 or 4 months then I had one that was light and lasted 3 days then this month is normal. However I have many pregnancy symptoms but all the tests I’ve done say negative. I have not been to a doctor due to not having insurance. What’s going on?

  2. Hi, I recently found out I am pregnant. My dates have me at 8 weeks. I have a dating scan next week. I have experienced brown spotting/discharge for 3 weeks now. No pain. Has anyone had this?

    1. Yes, I have experienced the same, mine had stopped recently for two to three days now . I have a dating scan tomorrow. Heaps of rest seemed to help me as every time I got up and did something it would start again.

  3. I’m 6 week pregnant. I been bleeding for last 5-6 days. It is moderate bleeding. I had another Us done today and my gynec said she saw lot of blood in my uterus around the baby. The baby is safe though with decent heartbeats for a 6 week. She did not have any other answer for me except to wait and watch! So waiting for the bleeding to stop! :(

  4. I’ve done 4 home pregnancy tests and went to the doctors and made sure if it was for real and I was pregnant and I went to an ultrasound and they couldn’t see anything and I didn’t get my period that month I fell pregnant but a week after I had bleeding

  5. Hi I found out I’m pregnant. About 5weeks now I have us next week but scared because I have noticed a light brown discharge is this normal? I am having no pain but two years ago had an ectopic pregnanc. Its so to not. Worry please if anyone. Has been threw this?

  6. I am 5weeks with light to moderate bleeding. I have all normal test results for a healthy pregnancy. Still awaiting to see why I’m bleeding. This is day three.

  7. I’ve took about 7-8 test (I know sounds crazy) All were faint lines but one was digital and said pregnant 1-2 weeks. Found out Thursday and Friday had light pink blood and now into Saturday it’s much heavier, however my husband and I did have intercourse last night .. ironically AF is due today … no idea what to think …

  8. I am 5 weeks pregnant and yesterday started spotting a brownish color. Not needing more than a panty liner but has been continuous. Should I be worried?

  9. I’m 5wks4days, 3 days ago I started bleeding but it wasn’t accompanied by any pain, it stopped on the same day too. I’m still having pregnancy symptoms but I’ve got an appointment tomorrow to check my hcg levels because they were just over 300. Anyone else experience this and still went on to be pregnant? I’m scared and anxious about tomorrow because I’ve had previous miscarriages.

  10. Okay so my girl friend is 4 weeks and 2 days and we had sex yesterday and later on she was bleeding could it be spotting or Could it be us from having sex .. Also this would Be our first child

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