Tests and treatments after miscarriage

It is sometimes possible to have tests to find out why you had a miscarriage and what this might mean for any future pregnancies.

Most women go on to have a healthy pregnancy after a miscarriage, so tests are not usually offered until a woman has recurrent miscarriages or 1 late miscarriage. This policy can seem frustrating. You’ve been through a traumatic experience and it is completely understandable to want to know why it happened. The reason for the policy is because most women who have 1 or 2 miscarriages will go on to have successful pregnancies.

However, some specialists may see women after 2 miscarriages in a row. It is worth talking to your GP to find out whether you can be referred for tests.

What tests might I have?

Blood tests

Blood tests can be used to check for blood clotting disorders such as antiphospholipid syndrome (APS) and thrombophilia.

Chromosomes are genetic structures in our cells that contain our DNA and the features we inherit from our parents. If your baby had abnormal chromosomes (see below), doctors may do some blood tests to check your and your partner’s chromosomes for abnormalities.

Testing the baby

You should be offered tests to check for abnormalities in your baby’s chromosomes. This is not always possible but may help doctors find out your chances of miscarrying again.

If you have had a late miscarriage, you may also be offered a post-mortem examination of your baby. This will not happen without your permission (consent). Find out more about what happens to your baby after miscarriage.

Tests to look at the shape of your womb

If you have recurrent miscarriages, you should be offered a pelvic ultrasound scan to check for any abnormalities in the shape of your uterus. You’ll be offered more tests if your doctors think there may be a problem.

Find out more about uterine abnormality.

Tests for infection

If you have had a late miscarriage, you may have blood tests and vaginal swabs to test for an infection.

Where do I have these tests?

The tests are normally done when you are referred to the recurrent miscarriage clinic. Any tests that need to be done at the time of the miscarriage will be done at the Early Pregnancy Unit or hospital.

What are my treatment options?

Treatments for antiphospholipid syndrome (APS)

If you have APS, you may be treated with low-dose aspirin tablets and heparin injections during your next pregnancy. These medications make your blood less likely to clot and are safe to take in pregnancy.

Having APS means you are at increased risk of complications during pregnancy, such as:

You should be carefully monitored so that you can be offered treatment for any problems that come up.

Treatment for thrombophilia

If you have thrombophilia and have had a miscarriage between 12 and 24 weeks of pregnancy, you should be offered treatment with heparin and aspirin.

Referral for genetic counselling

If either you or your partner has a chromosome abnormality, you should be offered the chance to see a specialist called a clinical geneticist. They will discuss with you what your chances are for future pregnancies and will explain what your choices are. This is known as genetic counselling.

Find out more about conception and your baby’s genes.

Monitoring and treatment for a weak cervix

If you have had a miscarriage between 14 and 24 weeks and have been diagnosed with a weak cervix (cervical incompetence), you may be offered an operation to put a stitch in your cervix during your next pregnancy. This is usually done through the vagina at 13 or 14 weeks of pregnancy under a general or spinal anaesthetic.

If it is unclear whether your late miscarriage was caused by a weak cervix, you may be offered vaginal ultrasound scans during your pregnancy to measure the length of your cervix. This may give information on how likely you are to miscarry. If your cervix is shorter than it should be before 24 weeks of pregnancy, you may be offered an operation to put a stitch in your cervix.

Find out more about cervical incompetence.

Surgery to the uterus

You may be offered surgery if you have a uterine abnormality although the effectiveness of this surgery is not well known.

Hormone treatment

You may be offered progesterone or human chorionic gonadotrophin hormones early in pregnancy to prevent recurrent miscarriage.

What happens next?

Your doctor will talk to you about your test results and what this tells them about your chances of having another miscarriage and successful pregnancy.

Even if you do have some tests, it’s important to know that doctors may not be able to find a reason why you’ve miscarried. This can be very distressing, but try not to worry too much if this is the case. Most couples are likely to have a successful pregnancy in the future, particularly if test results are normal.

Going through the process of having these tests can be stressful. Tommy’s is here to help you. You can talk to a Tommy’s midwife for free, Monday-Friday, 9am-5pm. You can call them on 0800 0147 800 or email [email protected]. All our midwives will be able to talk to you about what you’re going through.

Find out more about what other support is available.

Our research

Tommy’s is funding the cost of the UK’s first national Miscarriage Research Centre and aims to halve the number of miscarriages by 2030 by funding medical research.

1 in 4 pregnancies end in loss or preterm birth – and most parents never find out the real reason why. Our research is dedicated to finding out why miscarriages happen and how to prevent it in the future.

Find out more about our Tell Me Why campaign.

Brighton, P et al (2017) Clearance of senescent decidual cells by uterine natural killer cells in cycling human endometrium. eLife

Clinical Knowledge Summaries. Miscarriage https://cks.nice.org.uk/miscarriage (Page last reviewed: May 2018 Next review due: December 2023)

Royal College of Obstetricians & Gynaecologists (2016) Early miscarriage https://www.rcog.org.uk/globalassets/documents/patients/patient-information-leaflets/pregnancy/pi-early-miscarriage.pdf

Royal College of Obstetricians & Gynaecologists (2012) Recurrent and late miscarriage: tests and treatment of couples https://www.rcog.org.uk/globalassets/documents/patients/patient-information-leaflets/pregnancy/pi-recurrent-and-late-miscarriage---tests-and-treatment-of-couples.pdf

Royal College of Obstetricians & Gynaecologists (2016) The Role of Natural Killer Cells in Human Fertility https://www.rcog.org.uk/globalassets/documents/guidelines/scientific-impact-papers/sip_53.pdf

Brighton, P et al (2017) Clearance of senescent decidual cells by uterine natural killer cells in cycling human endometrium. eLife https://elifesciences.org/articles/31274

Lucas, ES, Vrljicak, P., Muter, J et al (2020) Recurrentl pregnancy loss is associated with a pro-senescent decidual response during the peri-implantation window. Communications Biology 3, 37 (2020) https://www.nature.com/articles/s42003-020-0763-1

Review dates
Last reviewed: 16 April 2020
Next review: 16 April 2023