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Trend analysis of the incidence of fetal lateralization abnormalities during different stages of COVID-19 infection.
| Period | Total population | Lateralized cases | Non-lateralized cases | χ2 | P |
|---|---|---|---|---|---|
| Pre-COVID-19 period (2017–2019) | 315,392 | 246 | 315,146 | 5.811 | 0.016 |
| Zero-COVID period (2020–2022) | 245,934 | 150 | 245,784 | ||
| Post-pandemic period (2023–2024) | 160,236 | 170 | 160,066 |
