How common is miscarriage?

Miscarriage is fairly common during the first 12 weeks of pregnancy.

It is hard to know how many miscarriages take place because sometimes a miscarriage can happen before the mother knows she is pregnant. The estimated figure is that miscarriage happens in around 1 in 4 recognised pregnancies, with 85% of those happening in the first trimester (weeks 1 to 12).

A 'late' miscarriage, which is much less common, may occur between weeks 13 to 24 of pregnancy.

Age makes a difference to risk levels:

  • If a woman is under 30, she has a 1 in 10 chance of miscarriage
  • If a woman is between 35 and 39, she has a 2 in 10 chance of miscarriage
  • If a woman is over 45, she has a 5 in 10 chance of miscarriage.

Read more miscarriage statistics.

After 24 weeks, the delivery of a baby who has died in the womb is referred to as a stillbirth.

What are the signs of miscarriage?

The main sign of a miscarriage is vaginal bleeding. This may be followed by cramping and pain in the lower abdomen.

Vaginal bleeding is the most common symptom of a miscarriage; it can vary from light spotting to a heavy bleed, heavier than a normal period. Some women are shocked by the volume of blood that they seem to lose.

Other signs are cramping or abdominal pain. Some women describe simply not feeling pregnant anymore. They may have lost the pregnancy symptoms such as nausea or breast tenderness that they had previously been feeling.

We still don’t know why all early miscarriages occur. In some cases, however, it is due to a genetic or chromosomal problem in the developing baby.

Find out what to do if you think you're having a miscarriage.

Missed miscarriage

It is possible to miscarry without having any of the usual symptoms, such as bleeding or pain. This is called a missed miscarriage.

Can anything be done to avoid miscarriage?

There are some things you can do to bring down your risk of having a miscarriage.

  • Avoid drinking alcohol in pregnancy

  • Don't use street drugs while pregnant

Being a healthy weight before pregnancy, eating a healthy diet and following guidance on what foods to avoid can also help.

Chromosome abnormality

Chromosomes contain the genetic material important for the make-up of the baby, and are found inside every cell within the body. When something goes wrong during the passing on or division of chromosomes, it can cause genetic abnormalities in the baby. This may cause a miscarriage. Chromosomal abnormalities are more likely in the babies of older mothers. 

A chromosomal abnormality resulting in a miscarriage is unlikley to affect subsequent pregnancies.

Find out more about the why miscarriage happens.

Am I at risk?

The following people have a slightly higher risk of having an early miscarriage

  • Older women: at 30, a woman has a 20% chance of miscarriage; at 42, this increases to 50%.
  • People with underlying health problems, such as poorly controlled diabetes
  • People who are obese have an increased risk of miscarriage.
  • People who engage in lifestyle choices that are harmful to the developing baby, such as heavy drinking, smoking and taking recreational drugs

If you fall into the last category you can reduce your risk by quitting smoking, stopping recreational drug use and quitting alcohol.

Ectopic pregnancy

An ectopic pregnancy is a pregnancy that develops outside of the womb, most commonly in the fallopian tube. Sometimes an ectopic pregnancy can also develop in the abdominal cavity. An ectopic pregnancy will end in miscarriage.

Find out what to do if you think you are having an ectopic pregnancy.

Read more about miscarriage


1. Macdonald S, magill-Cuerden J, Mayes' midwifery, fourteenth edition, London Balliere Tindall, 2011: 755

2. RCOG (2011), 'The investigation and treatment of couples with Recurrent First-Trimester and Second Trimester Miscarriage'. Green Top Guideline No 17, London Royal College of Obstetricians and Gynaecologists

3. NICE (2016), 'Ectopic pregnancy and miscarriage', National Institute for Health and Care Excellence [accessed 23/03/2018]

4. NHS Choices, 'Miscarriage': [accessed 23/03/2018]

5., 'Miscarriage (spontaneous abortion)': [accessed 23/03/2018] 

6. Rai R, Regan L (2006) Recurrent miscarriage. Lancet; 368(9535): 601-11

7. NHS Choices, 'Miscarriage, causes':[accessed 23/03/2018] 

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    Last reviewed on April 10th, 2018. Next review date April 10th, 2021.

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    Please note that these comments are monitored but not answered by Tommy’s. Please call your GP or maternity unit if you have concerns about your health or your baby’s health.
    • By Yoli (not verified) on 6 Apr 2020 - 19:23

      I’m 37 years old and just had an incomplete miscarriage two days ago. Per the doctor my hormones were low. Will I be able to get pregnant again and how soon can I have intercoarse to try again? I want to get pregnant now due to my age.
      Thank you

    • By Sabrea Smith (not verified) on 7 Feb 2020 - 18:21

      Hello, I’m 6 weeks pregnant with my first child. I’ve been experiencing so bleeding , passing blood clots , and some cramping lately. I went to the hospital and they said my hcG levels were at 1290. My cervix os is closed. They don’t know if it’s a really early pregnancy or if I’m actually miscarrying . With that being said , is it likely I’m going to miscarry this baby? Does the baby have a chance at all?

    • By Ann (not verified) on 13 Jul 2019 - 01:25

      I have 42 years old and i had a 2nd miscarriage. Is possible to have a health pregnancy? I am scared.

    • By Anonymous (not verified) on 11 Jun 2019 - 09:16

      I am eleven weeks pregnant and experiencing some bleeding, what is the likelihood of this not being a miscarriage? I am so scared but doctors and midwife only say that nothing can be done whether it is or isn't.

    • By K.G (not verified) on 13 Aug 2019 - 11:28

      It could be nothing.. it depends on your situation as everyone is different. However, in my case, I believed to have got up to 11 weeks of pregnancy and then started off with some light bleeding. I called the midwife hotline and explained.. they said it can be normal. The bleeding got heavier and and heavier throughout the week and then the pain started. Unfortunately, I had suffered a miscarriage but this was early on. When I had the scan they said they don't think I got even to 9 weeks but I had gone all those weeks with no symptoms. I didn't have ANY pregnancy symptoms either so that may have been a sign but I just thought I was lucky... If you are unsure go to see your Doctor and don't take no for an answer, that was my mistake. I was sent home from the hospital, having contractions for 4 days before i got my scan which was my 12 week scan that was pre-booked that they told me to 'just wait' for....

    • By Midwife @Tommys on 26 Oct 2018 - 10:12

      Unfortunately, miscarriage is common and not unusual, in fact 1 in 4 pregnancies end in miscarriage. There is not any evidence to show that miscarriage is more common in the first pregnancy. Please be reassured, that if you have had a miscarriage, it is still a very high chance that you will go on to have a healthy pregnancy the next time.
      Best wishes
      Tommy's midwife

    • By Love (not verified) on 25 Oct 2018 - 19:05

      Is it natural to have miscarriage of the first child?

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