If your pregnant patient is a vegetarian, be aware of the fact that she may test false positive for Down syndrome. In fact, she is about three times more frequently than omnivores and reference pregnancy populations to have falsely elevated hCG readings, according to a study from Taiwan.
Researchers studied over 200 lactovegetarian and omnivore singleton pregnancies and found that midtrimester maternal serum free ß-human chorionic gonadotropin (ß-hCG) levels were elevated in the vegetarian pregnancies, which led to the higher false-positive rate in Down syndrome screening. The elevation in maternal serum free ß-hCG was especially pronounced in vegetarian women with low serum vitamin B12 levels.
As a result, the authors emphasize the importance of adequate vitamin B12 for all pregnant women, but especially those who are vegetarians. In addition, they posit that Down syndrome screening in vegetarian pregnancies be accomplished through ultrasound markers and nuchal translucency measurement to avoid invasive confirmation procedures, at least until reference biochemical marker levels for hCG are established for vegetarian pregnancies.
Cheng PJ, Chu DC, Chueh HY, et al. Elevated maternal midtrimester serum free ß-human chorionic gonadotropin levels in vegetarian pregnancies that cause increased false-positive Down syndrome screening results. Am J Obstet Gynecol. 2004;190:442-447.
Long-term mortality risks for women with adverse pregnancy outcomes
April 19th 2024A recent study revealed that women who experience major adverse pregnancy outcomes face heightened long-term mortality risks, shedding light on the need for comprehensive understanding and preventative measures in women's health.
Read More
Unlocking placenta accreta spectrum with single-cell gene targets
April 18th 2024Discover how cutting-edge single-cell RNA sequencing unveils molecular insights into placenta accreta spectrum disorders, potentially revolutionizing diagnostics and treatments for this life-threatening pregnancy complication.
Read More