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. 2023 May;307(5):1645-1653.
doi: 10.1007/s00404-022-06646-6. Epub 2022 Jun 9.

Can endometrial thickness at baseline or maximum stimulated levels during IVF predict the presence of endometrial polyps in women with two failed embryo transfers?

Sofia Hussaini  1 , Dan Nayot  2 , Michael Hartman  3 , Michael H Dahan  4
Affiliations

Can endometrial thickness at baseline or maximum stimulated levels during IVF predict the presence of endometrial polyps in women with two failed embryo transfers?

Sofia Hussaini et al. Arch Gynecol Obstet. 2023 May.

Abstract

Purpose: To evaluate whether different measurements of endometrial thickness pre-IVF cycle and during the IVF cycles as measured by transvaginal ultrasound are associated with the absence or presence of endometrial polyps.

Design: A retrospective cohort study was conducted in a university-affiliated fertility center. Patients were women who underwent two embryo transfer cycles and failed to conceive.

Interventions: hysteroscopic evaluation and resection of any masses.

Results: There was no difference on comparing the groups with and without polyps in the mean endometrial thicknesses at baseline scans pre-treatment or during IVF cycle. For women who failed two embryo transfer cycles, at any given endometrial thickness the probability of the presence of a polyp was 30-40%. ROC curves failed to detect an actionable relationship with different endometrial thicknesses and the relationship with an endometrial polyp, with most areas under the curve being just above 0.5. However, once the maximum stimulated endometrial thickness was ≥ 13 mm, there was a 70% chance of a polyp being noted at hysteroscopy. This was a statistical difference in the probability of a polyp being present as compared to the lesser thicknesses (p = 0.05).

Conclusion: Baseline or maximum stimulated endometrial thickness at IVF fails to predict with accuracy the presence of a polyp. However, if the maximum stimulated thickness was at least 13 mm, there was a higher probability of a uterine polyp being present. Such a cutoff would nevertheless miss most polyps. At any baseline thickness on CD 2-5, a polyp has a 30-40% probability of being present in women who failed two embryo transfers. ROC curves suggest that at baseline, or maximum stimulated endometrial thickness, the ability to predict a polyp is no better than flipping a coin. As such, endometrial cavity evaluation for polyps is legitimate in women with two embryo transfers irrelevant of the baseline or stimulated thickness.

Keywords: Failed embryo transfer; Polyp; Transvaginal ultrasound.

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