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CC BY-NC-ND 4.0 · Ultraschall Med 2023; 44(02): e126-e135
DOI: 10.1055/a-1634-4955
Original Article

A Study on the Prediction of Reproductive Outcomes in Frozen Embryo Transfer Cycles by Calculating the Volume of Uterine Junctional Zone with Three-Dimensional Ultrasound

Vorhersage des reproduktiven Outcomes bei Transfer im Kryozyklus (Frozen Embryo Transfer) durch Berechnung des Volumens des Endometriums der Junktionalzone mit 3D-Ultraschall
Yan Liu
1   Department of Ultrasound, Dalian Municipal Women and Children's Medical Center, Dalian, China
2   Department of Ultrasound, Shengjing Hospital of China Medical University, Shenyang, China (Ringgold ID: RIN85024)
,
Lei Wang
3   Department of Reproductive Center, Dalian Municipal Women and Children's Medical Center, Dalian, China
,
MeiXian Wang
3   Department of Reproductive Center, Dalian Municipal Women and Children's Medical Center, Dalian, China
,
Yu Jiang
1   Department of Ultrasound, Dalian Municipal Women and Children's Medical Center, Dalian, China
,
TingTing Xia
3   Department of Reproductive Center, Dalian Municipal Women and Children's Medical Center, Dalian, China
,
QingXiong Yue
4   Department of Ultrasound, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian, China (Ringgold ID: RIN74545)
,
YuJia Sha
4   Department of Ultrasound, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian, China (Ringgold ID: RIN74545)
,
Ying Huang
2   Department of Ultrasound, Shengjing Hospital of China Medical University, Shenyang, China (Ringgold ID: RIN85024)
› Author AffiliationsThis study was supported by grants from the Guide Project for Key Research and Development Foundation of Liaoning Province (No. 2019JH8/10300008), Scientific Research Project of the Educational Department of Liaoning Province (ZF2019023),345 Talent Project and Liaoning BaiQianWan Talents Program.
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Abstract

Purpose To prospectively study the influence of the volume of the uterine junctional zone (JZ) as a novel predictor of reproductive outcomes in frozen embryo transfer cycles.

Methods Among the first 30 patients, intra- and interobserver repeatability was evaluated and expressed as a coefficient of repeatability. The same classification system was used to evaluate the JZ of 142 infertility patients undergoing in vitro fertilization (IVF). Ultrasonography was performed on the day before transplantation. The three-dimensional (3D) volume images were then analyzed to obtain the volume of the endometrium (EV), the average thickness of the JZ on the coronal plane, and the volume of the JZ (JZV). The JZV was then divided by the EV. These parameters were compared with the outcomes of clinical pregnancy.

Results The 3D image showed that the JZ achieved a good intra- and interobserver consistency (k = 0.862, k = 0.694). The total pregnancy rate was 47%. There was a highly significant difference between pregnant and non-pregnant women with respect to age (p < 0.001), JZV (p = 0.003), and JZV/EV (p < 0.001) on the day before transplantation. Age and JZV/EV were independent factors for predicting the success of IVF transplantation (p = 0.010, p = 0.016). The area under the ROC curve of JZV/EV in predicting clinical pregnancy was 0.688, the cut-off value was 0.54, the sensitivity was 83.8%, and the specificity was 50.0%.

Conclusion Age and JZV/EV are independent factors for predicting the success of frozen embryo transfer cycles in IVF. A smaller JZV/EV was more beneficial for clinical pregnancy.

Zusammenfassung

Ziel Prospektive Untersuchung des Einflusses des Volumens der Junktionalzone (JZ) des Myometriums als neuartiger Prädiktor für den reproduktiven Outcome nach Transfer im Kryozyklus (Frozen-Embryo-Transfer, FET).

Methoden Bei den ersten 30 Patientinnen wurde die Intra- und Interobserver-Reproduzierbarkeit bewertet und die Wiederholbarkeit als „Coefficient of Repeatability“ ausgedrückt. Dasselbe Klassifizierungssystem wurde zur Bewertung der JZ von 142 Patientinnen mit Infertilität verwendet, die sich einer In-vitro-Fertilisation (IVF) unterzogen. Die Ultraschalluntersuchung wurde am Tag vor dem Transfer durchgeführt. Die 3-dimensionalen (3D) Volumenbilder wurden anschließend analysiert, um das Endometriumvolumen (EV), die durchschnittliche Dicke der JZ in der koronalen Ebene und das JZ-Volumen (JZV) zu ermitteln. Die Ratio JZV/EV wurde berechnet. Diese Parameter wurden mit dem Ausgang der klinischen Schwangerschaft verglichen.

Ergebnisse Die 3D-Aufnahme zeigte, dass die JZ eine gute Intra- und Interobserver-Konsistenz erreichte (k=0,862; k=0,694). Die Schwangerschaftsrate betrug insgesamt 47%. Es gab einen hochsignifikanten Unterschied zwischen schwangeren und nicht schwangeren Frauen in Bezug auf Alter (p < 0,001), JZV (p = 0,003) und JZV/EV (p < 0,001) am Tag vor dem Transfer. Alter und JZV/EV waren unabhängige Faktoren für die Vorhersage des Erfolgs bei IVF-Transfer (p=0,010; p = 0,016). Die Fläche unter der ROC-Kurve von JZV/EV zur Vorhersage einer klinischen Schwangerschaft betrug 0,688, der Cut-off-Wert lag bei 0,54. Die Sensitivität betrug 83,8 % und die Spezifität 50,0%.

Schlussfolgerung Alter und JZV/EV sind unabhängige Faktoren für die Vorhersage eines erfolgreichen Transfers kryokonservierter Embryonen bei IVF. Eine geringere JZV/EV-Ratio war für eine klinische Schwangerschaft günstiger.

Keywords

three-dimensional ultrasound - endometrial volume - in vitro fertilization - clinical pregnancy - uterine junctional zone


Publication History

Received: 29 May 2021

Accepted after revision: 31 August 2021

Article published online:
24 November 2021

© 2021. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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