Alopecia Areata Linked to Higher Risk of Pregnancy Loss and PPROM, New Analysis Finds
USA: A new retrospective cohort study has found that alopecia areata (AA)-an autoimmune condition primarily known for causing patchy hair loss-may also be linked to important pregnancy complications.
The research, published in the Journal of the American Academy of Dermatology, reports that women with AA faced a significantly higher likelihood of spontaneous abortion and more than double the risk of preterm premature rupture of membranes (PPROM).
The study, led by Alexa S. Podolsky from the Renaissance School of Medicine at Stony Brook University, evaluated data from the TriNetX research network, a large database of electronic health records. Researchers examined 6328 pregnancies recorded between 2004 and 2025 to understand whether AA influences maternal outcomes. After applying propensity score matching, 3164 pregnancies in women with AA were compared with an equal number of pregnancies in women without the condition. Both groups were matched for age, race, ethnicity, and comorbid health conditions to ensure balanced comparison.
The average age of pregnancy among participants was 29.6 years, with more than half identifying as White and nearly 20% as Black. The research team assessed adverse pregnancy outcomes within one year of the documented pregnancy diagnosis, focusing on both early and late gestational complications.
Key findings of the analysis were as follows:
- Women with alopecia areata had a 36% higher risk of experiencing spontaneous abortion compared to those without AA (RR 1.36).
- The risk of preterm premature rupture of membranes was more than double in women with AA (RR 2.20).
- PPROM is a severe complication linked to infection, premature delivery, and increased neonatal health risks.
- No significant differences were observed between the two groups in rates of fetal growth restriction, hypertensive disorders of pregnancy, or gestational diabetes.
- The findings indicate that AA may specifically elevate risks related to pregnancy loss and membrane rupture rather than broadly affecting all pregnancy complications.
The authors noted that these findings reinforce the growing understanding of alopecia areata as a systemic autoimmune disorder rather than a condition limited to hair follicles. “AA was associated with increased risk of spontaneous abortion and PPROM, corroborating mounting evidence that AA is not just a hair disorder, but a systemic autoimmune condition with identifiable risks,” they wrote.
They recommended that dermatologists collaborate closely with obstetric and gynecologic specialists to ensure active surveillance of pregnant women with AA. This may include early referral to maternal-fetal medicine experts and routine monitoring for signs of pregnancy loss or premature membrane rupture.
However, the study does carry limitations. Its retrospective design introduces potential biases, including miscoding in medical records and the inability to determine fetal outcomes or the severity of alopecia areata. Residual confounding may also affect the results.
"Despite these constraints, the study highlights important clinical considerations and suggests that women with alopecia areata may benefit from enhanced prenatal monitoring to reduce preventable risks," the authors concluded.
Reference:
Podolsky, A. S., Singal, A., Goh, C., & Lipner, S. R. (2025). Alopecia areata is associated with adverse pregnancy outcomes in a retrospective cohort study using TriNetX. Journal of the American Academy of Dermatology. https://doi.org/10.1016/j.jaad.2025.11.083
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