4.2. Strengths and Limitations
Currently there are only meta-analyses of the epidemiology of common patients infected with COVID-19, and there is few meta- analysis to explore the clinical features and outcomes of pregnant women with COVID-19. It is helpful to formulate clinical treatment strategies for pregnant women with COVID-19.
The disadvantage of this article is the small sample and the general quality of included documents, which lowers the credibility of the meta-analysis results. Besides all the included articles are retrospectively case analysis without control group, it also biased the results. Furthermore, the funnel plots showed that most indicators may have publication bias. Most of the included cases are Chinese, and the others are American. There are few reports describing the cases outside the two regions. Further research on pregnant women with COVID-19 worldwide is needed.