Experiencing one miscarriage is heartbreaking enough. Going through it more than once can leave you feeling confused, frightened and desperate for answers. If this sounds familiar, please know that you are not alone, and that recurrent pregnancy loss is a recognised medical condition with real, evidence based paths forward.
This article explains what recurrent pregnancy loss means, what commonly causes it, how it is investigated, and what treatment options are available.
What is recurrent pregnancy loss?
Recurrent pregnancy loss is generally defined as two or more failed pregnancies, including losses confirmed by a positive pregnancy test or by ultrasound, occurring before 20 weeks of pregnancy.
While a single miscarriage is relatively common, affecting around 15 to 20 percent of pregnancies and often due to a one-off chance issue, two or more losses in a row are considered significant enough to warrant a full medical investigation.
Recurrent pregnancy loss affects approximately 1 percent of couples trying to conceive. While that may sound rare, it is a well studied condition, and specialists today are able to identify a probable cause in around 60 percent of cases.
Common causes of recurrent pregnancy loss
There is rarely a single, simple explanation for recurrent pregnancy loss. In many cases, a combination of factors is at play. The most common causes include the following.
Genetic and chromosomal abnormalities
Chromosomal abnormalities in the embryo are responsible for roughly half of all early miscarriages. These typically occur randomly during the formation of the egg or sperm, although in some cases, one partner may carry what’s known as a balanced translocation, a rearrangement of genetic material that does not affect their own health but can increase the risk of pregnancy loss.
Uterine abnormalities
Structural issues within the uterus can interfere with an embryo’s ability to implant and grow successfully. These can include fibroids, polyps, scar tissue or a septate uterus, where a band of tissue divides the uterine cavity. A septate uterus is considered one of the most common uterine causes of recurrent loss.
Hormonal and endocrine disorders
Conditions such as uncontrolled diabetes, thyroid dysfunction and elevated prolactin levels can all disrupt the hormonal balance needed to sustain a healthy pregnancy.
Autoimmune conditions
Antiphospholipid syndrome, an immune disorder that increases the risk of abnormal blood clotting, is one of the more well established autoimmune causes of recurrent pregnancy loss. It can interfere with blood flow to the developing placenta.
Male factor contributions
Sperm quality, including DNA fragmentation, may also play a role in some cases of recurrent loss, although this area is less well understood than female factors.
Lifestyle and other factors
Smoking, excessive alcohol or caffeine intake, obesity and exposure to certain environmental toxins have all been associated with an increased risk of pregnancy loss and are worth addressing as part of any evaluation.
Unexplained cases
Even with thorough testing, some couples will not receive a clear explanation. This can be frustrating, but it does not mean the outlook is poor. Many couples with unexplained recurrent loss go on to have successful pregnancies.
What testing is required?
If you have experienced two or more pregnancy losses, a thorough evaluation is recommended. This typically includes:
A detailed history and physical examination
Your specialist will review the timing and details of each loss, along with your overall reproductive and medical history.
Genetic testing
This may include chromosomal blood tests for both partners and, where tissue is available, genetic analysis of the pregnancy loss itself.
Uterine evaluation
Imaging such as ultrasound, hysterosalpingography or hysteroscopy helps assess the shape and structure of the uterus, checking for fibroids, polyps or scarring.
Hormonal and metabolic screening
Blood tests assess thyroid function, blood sugar control and other relevant hormone levels.
Blood clotting and immune testing
Testing for antiphospholipid syndrome and other clotting related conditions can identify treatable autoimmune contributors.
Sperm analysis
An advanced semen analysis, including DNA fragmentation testing, may be recommended to assess male factor contributions.
Treatment options for recurrent pregnancy loss
Once a probable cause is identified, treatment can be tailored accordingly. Common approaches include the following.
Surgical correction
Structural issues such as polyps, fibroids or a septate uterus can often be corrected surgically to improve the uterine environment for implantation.
Genetic counseling and preimplantation genetic testing
For couples with an identified genetic or chromosomal factor, in vitro fertilisation combined with preimplantation genetic testing allows embryos to be screened before transfer.
Hormonal therapy
Where hormonal imbalances are identified, targeted treatment can help support implantation and early pregnancy.
Medication for clotting or immune conditions
Blood thinners are often used to manage antiphospholipid syndrome and reduce the risk of clot related pregnancy loss.
Lifestyle support
Addressing modifiable factors such as smoking, alcohol use, weight and chronic health conditions can meaningfully improve outcomes.
Close monitoring
When no clear cause is found, many specialists recommend closely monitoring future pregnancies through regular blood work and ultrasounds. This kind of structured support and reassurance has been shown to improve outcomes on its own, even without a specific treatable cause identified.
The encouraging news is that even without a definitive diagnosis, most women who experience recurrent pregnancy loss go on to have a successful pregnancy.
How Fertility Choice can help
At Fertility Choice, we understand how emotionally difficult recurrent pregnancy loss can be, and we are committed to providing clear answers and compassionate, personalised care.
Our team offers comprehensive testing to investigate the possible causes behind your losses, from genetic and hormonal screening to detailed uterine assessments. From there, we work with you to build a treatment plan suited to your specific situation, along with the emotional support to help you feel less alone throughout the process.
Conclusion
Recurrent pregnancy loss can feel isolating, but it is a well understood condition with a range of effective diagnostic tools and treatment options. Whether a clear cause is found or not, the right support and care can make a meaningful difference to your chances of a successful pregnancy.
Contact Fertility Choice today to book a consultation and start your journey toward answers, support and hope.
FAQs
What is the most common cause of recurrent miscarriage?
Chromosomal abnormalities in the embryo are the most common identifiable cause, accounting for roughly half of all early pregnancy losses. Uterine abnormalities and hormonal disorders are also frequently identified contributors.
How many miscarriages before a successful pregnancy?
This varies widely between individuals. Even after two or more losses, most women go on to have a successful pregnancy, particularly once an underlying cause is identified and appropriately managed, or with close monitoring where no cause is found.
I have had two miscarriages. What could be causing this?
Two miscarriages in a row can be due to a range of factors, including chromosomal issues, uterine abnormalities, hormonal imbalances or autoimmune conditions, though a clear cause is not always identified. A fertility specialist can guide you through the appropriate testing to investigate further.
What are the common causes of recurrent pregnancy loss?
Common causes include genetic or chromosomal abnormalities, structural uterine issues such as fibroids or a septate uterus, hormonal and thyroid disorders, autoimmune conditions such as antiphospholipid syndrome, and, in some cases, male factor contributions or lifestyle related factors.
