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. 2023 Jul 10;2(1):e000403. doi: 10.1136/bmjmed-2022-000403

Figure 1.

Figure 1

Method for identifying individuals who were pregnant when infected with the SARS-CoV-2 virus. PCR=polymerase chain reaction; HES=Hospital Episode Statistics; ICD-10=international classification of diseases, 10th revision; OPCS-4=Office of Population Censuses and Surveys Classification of Interventions and Procedures, version 4