CC BY 4.0 · Rev Bras Ginecol Obstet 2023; 45(03): 142-148
DOI: 10.1055/s-0043-1768459
Original Article
Assisted Fertilization

Fertility Does not Quarantine: Coronavirus Disease 2019 Pandemic Impacts on in Vitro Fertilization Clinical Pregnancy Rates

Fertilidade não fica em quarentena: impacto da pandemia COVID-19 nas taxas de gravidez clínica em fertilização in vitro
1   Faculty of Medicine, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
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1   Faculty of Medicine, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
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1   Faculty of Medicine, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
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2   Medical Service, Brazilian Army, Curitiba, PR, Brazil
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3   Faculty of Medicine, Positivo University, Curitiba, PR, Brazil
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1   Faculty of Medicine, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
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1   Faculty of Medicine, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
4   Department of Human Reproduction, Embryo Human Reproduction Center, Curitiba, PR, Brazil
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1   Faculty of Medicine, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
3   Faculty of Medicine, Positivo University, Curitiba, PR, Brazil
5   Department of Tocogynecology, Faculty of Medicine, Federal University of Paraná, Curitiba, PR, Brazil
6   Department of Gynecology, Faculty of Medicine, Mackenzie Evangelical College of Paraná, Curitiba, PR, Brazil
› Author Affiliations

Abstract

Objective To understand the impact of the coronavirus disease 2019 pandemic on in vitro fertilization (IVF) clinical pregnancy rates and analyze factors that may have influenced their outcome.

Methods This was a retrospective observational study conducted at a tertiary-care Brazilian fertility center. All fresh IVF and embryo warming cycles performed from March 11 to December 31, 2018–2021 were analyzed, and their data were used to calculate fertilization, embryo cleavage, cycle cancellation, embryo transfer (ET), and clinical pregnancy rates. Statistical tests were used to evaluate the alterations found. Logistic regression models were used to explore the association of the categorical variables with the observed clinical pregnancy rates. Data from 2018 and 2019 (prepandemic) and 2020 and 2021 (pandemic) were grouped.

Results A total of 756 cycles were analyzed (n = 360 prepandemic and n = 396 pandemic). The age group of the patients, fertilization rates, and cleavage rates did not have significant differences (p > 0.05). There was a reduction in the percentage of fresh IVF and an increase in embryo warming cycles (p = 0.005) during the pandemic. There was also an increase in fresh cycle cancellations (p < 0.001) and a reduction in ET rates (p < 0.001). The pandemic had a negative impact on clinical pregnancy rates (p < 0.001) especially due to the increase in fresh cycle cancellations (p < 0.001).

Conclusion Embryo warming cycles with subsequent frozen-thawed ET were presented as a viable alternative to continue assisted reproductive treatments against pandemic restrictions on fresh cycles, ensuring clinical pregnancy, albeit at a lower rate than that of the prepandemic period.

Resumo

Objetivo Compreender os impactos da pandemia de COVID-19 nas taxas de gravidez clínica em fertilização in vitro (FIV) e analisar fatores que possam ter influenciado seu resultado.

Métodos Foi realizado um estudo observacional retrospectivo em um centro brasileiro de reprodução assistida. Todos os ciclos de FIV com embriões frescos e descongelados realizados entre 11 de março e 31 de dezembro, 2018-2021 foram analisados, e seus dados utilizados para cálculo das taxas de fertilização, clivagem embrionária, cancelamento de ciclos, transferência de embriões (TE) e gravidez clínica. Testes estatísticos avaliaram significância das alterações encontradas e modelos de regressão logística exploraram associação das variáveis categóricas estudadas com as taxas de gravidez clínica observadas. Os dados de 2018 e 2019 (pré-pandemia) e 2020 e 2021 (pandemia) foram agrupados.

Resultados Foram analisados um total de 756 ciclos (n = 360 na pré-pandemia e n = 396 na pandemia). A faixa etária das pacientes e as taxas de fertilização e de clivagem não tiveram alterações significativas (p > 0,05). Na pandemia, houve redução da porcentagem de ciclos de FIV com embriões frescos e aumento dos com descongelamento (p = 0,005). Também foi notado aumento das taxas de cancelamentos de ciclos com embriões frescos (p < 0,001) e redução do número de TEs (p < 0,001). A pandemia exerceu impacto negativo na taxa de gravidez clínica (p < 0,001), especialmente devido ao aumento de cancelamentos dos ciclos a fresco (p < 0,001).

Conclusão Frente às limitações pandêmicas impostas aos ciclos com embriões frescos, os ciclos de descongelamento de embriões se apresentaram como alternativa viável à continuidade dos ciclos de FIV, garantindo gravidez clínica ainda que em taxas inferiores às do período pré-pandêmico.

Contributions

Vieira F. A., Pasquini Neto R., and Pachniki J. P.A. contributed to the conception and design of the study. Vieira F. A. and Pasquini Neto R. performed data collection, statistical analysis, and prepared the manuscript. Morila M. C. G., Curimbaba J. B. and Pasquini D. S. assisted in the writing of the manuscript and edited the manuscript according to the journal's instructions for authors. Felchner P. C. Z., Wandresen G., and Pachniki J. P.A. helped in the interpretation of data and revised the manuscript. All authors have read and approved the final content of the manuscript.




Publication History

Received: 28 July 2022

Accepted: 21 September 2022

Article published online:
27 April 2023

© 2023. Federação Brasileira de Ginecologia e Obstetrícia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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