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. 2022 Feb 6;10(2):390. doi: 10.3390/biomedicines10020390

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Effect of assisted reproductive technology on the prevalence of placenta previa (sensitivity analysis). All analyses were performed using an unadjusted analysis. All analyses compared the rates of placenta previa of the examination and control groups. The pooled odds ratios (ORs) for the comparisons were determined for the following groups: (A) ART with endometriosis versus ART without endometriosis; (B) women with endometriosis who conceived using ART versus women with endometriosis who conceived spontaneously; (C) frozen embryo transfer (ET) versus fresh ET; and (D) hormone replacement cycle (HRC) versus normal cycle (NC). Forest plots were ordered within the stratum by relative weight (%) and the publication year of the study. Substantial heterogeneity was observed during analysis (A) (I² = 73%), moderate heterogeneity was observed during analysis (C) (I² = 52%), and considerable heterogeneity was detected during analysis (C) (I² = 54%). Some values might be slightly different from the original values, because calculations were performed using RevMan ver. 5.4.1. Abbreviations: ART, assisted reproductive technology; OR, odds ratio; CI, confidence interval; SE, standard error; PP, placenta previa; ART_end, endometriosis who conceived using ART; SC_end, endometriosis who conceived spontaneously; Frozen, frozen embryo transfer; Fresh, fresh embryo transfer.

Effect of assisted reproductive technology on the prevalence of placenta previa (sensitivity analysis). All analyses were performed using an unadjusted analysis. All analyses compared the rates of placenta previa of the examination and control groups. The pooled odds ratios (ORs) for the comparisons were determined for the following groups: (A) ART with endometriosis versus ART without endometriosis; (B) women with endometriosis who conceived using ART versus women with endometriosis who conceived spontaneously; (C) frozen embryo transfer (ET) versus fresh ET; and (D) hormone replacement cycle (HRC) versus normal cycle (NC). Forest plots were ordered within the stratum by relative weight (%) and the publication year of the study. Substantial heterogeneity was observed during analysis (A) (I² = 73%), moderate heterogeneity was observed during analysis (C) (I² = 52%), and considerable heterogeneity was detected during analysis (C) (I² = 54%). Some values might be slightly different from the original values, because calculations were performed using RevMan ver. 5.4.1. Abbreviations: ART, assisted reproductive technology; OR, odds ratio; CI, confidence interval; SE, standard error; PP, placenta previa; ART_end, endometriosis who conceived using ART; SC_end, endometriosis who conceived spontaneously; Frozen, frozen embryo transfer; Fresh, fresh embryo transfer.