Pregnancy loss can be one of life’s most heartbreaking experiences. If you’ve experienced one or more losses, please know that you’re not alone. Early pregnancy loss, often called miscarriage, is surprisingly common—occurring in approximately 15-25% of all clinically recognized pregnancies. While a single loss can be devastating, most people will go on to have successful pregnancies afterward.
But what about when pregnancy loss happens more than once? When should you seek specialized testing? And most importantly, what hope is there for a future successful pregnancy?
What is Recurrent Pregnancy Loss?
Recurrent pregnancy loss (RPL) is generally defined as two or more pregnancy losses. These are pregnancies that have been confirmed by ultrasound or pregnancy tissue examination. Though definitions vary among medical organizations, many doctors begin evaluation after two losses, especially if you’re over 35 or have other fertility concerns.
Do Chemical Pregnancies Count as Pregnancy Loss?
A chemical pregnancy is a very early pregnancy loss that occurs shortly after implantation, usually before or around the time of your expected period. It’s called “chemical” because the pregnancy is only confirmed through blood or urine tests detecting the pregnancy hormone (hCG), but no gestational sac is ever visible on ultrasound.
In clinical practice:
- Most medical organizations now include chemical pregnancies in their definition of pregnancy loss
- For patients undergoing fertility treatments or in vitro fertilization, where early pregnancy testing is routine, chemical pregnancies are typically counted
- The European Society of Human Reproduction and Embryology specifically includes biochemical pregnancies (detected by serum or urine tests) in their definition of recurrent pregnancy loss
While a single chemical pregnancy is extremely common and generally doesn’t warrant investigation, recurrent chemical pregnancies may suggest an underlying issue and should be discussed with your healthcare provider.
The Emotional Impact
Before discussing the medical aspects, let’s acknowledge that RPL takes a tremendous emotional toll. The grief can be overwhelming, and each loss may intensify feelings of sadness, anxiety, anger, and even guilt. These feelings are normal, and seeking emotional support—whether through counseling, support groups, or trusted loved ones—is just as important as medical care.
When Should Testing Begin?
After One Loss
Most healthcare providers don’t recommend extensive testing after a single pregnancy loss. Why?
- A single loss is common and usually random, with approximately 50-60% resulting from chromosomal abnormalities that occur by chance
- The chance of having a live birth after one miscarriage remains high—very similar to someone who hasn’t experienced a loss
- Extensive testing after one loss rarely identifies treatable causes
However, testing after one loss might be considered if:
- You’re 35 or older
- You’ve been trying to conceive for more than a year without success
- You have known fertility problems
- The loss occurred late in the first trimester or in the second trimester
- You have a medical condition that might impact pregnancy (like thyroid disease or diabetes)
After Two or More Losses
After two consecutive losses, most reproductive specialists recommend beginning evaluation. The chance that there’s an identifiable issue increases, and addressing any underlying factors may help improve outcomes for future pregnancies.
What Tests Should Be Considered?
If you’ve experienced recurrent pregnancy loss, these are the most valuable tests that your doctor might recommend:
1. Genetic Testing
- Chromosomal analysis of both partners to check for balanced translocations or other genetic issues
- When possible, genetic testing of the pregnancy tissue can help determine if chromosomal abnormalities caused the loss
2. Uterine Evaluation
- Imaging of your uterus through sonohysterography, hysterosalpingogram, or hysteroscopy to check for:
- Congenital abnormalities (like a septate uterus)
- Fibroids or polyps
- Scar tissue (adhesions)
3. Blood Tests
- Antiphospholipid antibody testing to check for this syndrome, which occurs in 5-15% of women with RPL
- Thyroid function tests and antibodies, as thyroid problems can impact pregnancy
- Blood sugar and A1C to check for diabetes
- Hormone levels such as prolactin to rule out endocrine issues
4. Optional Testing
Depending on your specific situation, your doctor might also consider:
- Testing for certain clotting disorders, especially if you’ve had later pregnancy losses
- Assessment for immune system abnormalities (though treatments for these remain controversial)
- Evaluation for PCOS (polycystic ovary syndrome)
What Are the Causes and Treatments?
In about 50% of cases, a specific cause for RPL can be identified:
Genetic Factors (3-5% of cases)
Treatment: Genetic counseling, possibly IVF with preimplantation genetic testing, or consideration of donor eggs/sperm
Note: These parental genetic factors (like balanced translocations) are different from the random chromosomal abnormalities that account for 50-60% of all pregnancy losses.
Uterine Abnormalities (10-15% of cases)
Treatment: Surgical correction of uterine septum, removal of fibroids or polyps, or repair of scar tissue
Antiphospholipid Syndrome (5-15% of cases)
Treatment: Low-dose aspirin or heparin during pregnancy
Hormonal or Metabolic Issues (15-20% of cases)
Treatment: Treatment of underlying conditions (thyroid disease, diabetes, etc.)
Unexplained Causes (40-50% of cases)
Even when no cause is found, there are approaches that may help, including:
- Lifestyle modifications (reducing alcohol, caffeine, and tobacco)
- Achieving a healthy weight
- Specialized monitoring and support in early pregnancy
Reasons for Hope
Perhaps the most important information is this: even after multiple pregnancy losses, the prognosis for a successful future pregnancy is generally good.
- After 3 pregnancy losses, the chance of a successful pregnancy is still approximately 65-70%
- Even after experiencing RPL without an identified cause, about 70-75% of women will achieve a successful pregnancy
- Success rates are highest for those with secondary RPL (having had a previous live birth)
- Success rates are also higher for younger women, but many women over 35 with RPL still have successful pregnancies
Final Thoughts
Each person’s journey is unique. What works for one couple may not work for another, and sometimes the path to a viable pregnancy involves multiple approaches. But with appropriate care, the majority of individuals and couples experiencing recurrent pregnancy loss will ultimately achieve their goal of having a child.
Wherever you are in this journey, be gentle with yourself. Pregnancy loss is difficult, but you are not alone, and there is reason for hope.
Sources
- American College of Obstetricians and Gynecologists. ACOG Practice Bulletin No. 200: Early Pregnancy Loss. Obstetrics & Gynecology. 2018.
- American Society for Reproductive Medicine. Evaluation and treatment of recurrent pregnancy loss: a committee opinion. Fertility and Sterility. 2012.
- ESHRE Guideline Group on RPL, Bender Atik R, Christiansen OB, et al. ESHRE guideline: recurrent pregnancy loss. Human Reproduction Open. 2018.
- Magnus MC, Wilcox AJ, Morken NH, Weinberg CR, Håberg SE. Role of maternal age and pregnancy history in risk of miscarriage: prospective register based study. BMJ. 2019.
- Wong LF, Porter TF, Scott JR. Immunotherapy for recurrent miscarriage. Cochrane Database of Systematic Reviews. 2014.
- Clifford K, Rai R, Regan L. Future pregnancy outcome in unexplained recurrent first trimester miscarriage. Human Reproduction. 1997.
- Kolte AM, van Oppenraaij RH, Quenby S, et al. Non-visualized pregnancy losses are prognostically important for unexplained recurrent miscarriage. Human Reproduction. 2014.
- Stephenson MD, Awartani KA, Robinson WP. Cytogenetic analysis of miscarriages from couples with recurrent miscarriage: a case-control study. Human Reproduction. 2002.
- Lund M, Kamper-Jørgensen M, Nielsen HS, Lidegaard Ø, Andersen AM, Christiansen OB. Prognosis for live birth in women with recurrent miscarriage: what is the best measure of success? Obstetrics & Gynecology. 2012.