A test that screens IVF embryos for chromosome problems without removing any of their cells did not improve ongoing pregnancy rates for women ages 35 to 42, according to a randomized clinical trial published in Nature Communications.
Among 1,152 patients analyzed, 38.7% of those whose embryo was chosen using the non-invasive test had an ongoing pregnancy beyond 12 weeks, compared with 36.8% of those whose embryo was chosen by standard visual grading. The difference was not statistically significant. Live birth rates were also similar, at 37.0% and 35.5%.
