The almost relentless worldwide diffusion of severe acute respiratory syndrome coronavirus (SARS-CoV-2) is deeply engaging the minds of many scientists, clinicians and laboratory professionals, who struggle to identify the possible short- and long-term consequences of coronavirus disease 2019 (COVID-19) in the general population, as well as in specific cohorts of individuals, who may display peculiar features of infection. Pregnant women represent one of these categories, since the biological implications of SARS-CoV-2 infection extend far beyond those caused to the mother, involving also the fetus. Several lines of evidence now attest that although mother-to-child SARS-CoV-2 transmission is relatively rare (<2% of all pregnancies), the consequences on maternal-fetal-neonatal interface of COVID-19 can be very serious. To this end, some important questions raise, such as “is COVID-19 a risk factor for complications in pregnancy?”, “which laboratory tests are more predictable of unfavorable pregnancy outcomes?”, “how efficacious is COVID-19 vaccination in pregnancy?” and, last but not least, “what evidence supports laboratory monitoring of COVID-19 vaccination immunogenicity in pregnancy?”. In this opinion paper, we will attempt to provide an overview of the current biological, clinical and laboratory evidence of SARS-CoV-2 infection in pregnancy, trying also to provide reliable answers to the aforementioned questions.
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