Impact of the First and Second Lockdown for COVID-19 Pandemic on Preterm Birth, Low Birth Weight, Stillbirth, Mode of Labor, and of Delivery in Lombardy, Italy.

We investigated the effect of lockdown measures implemented in Lombardy on selected obstetric and perinatal outcomes. Births that occurred during the two lockdowns imposed (i.e., the first from 16 March to 2 June 2020 and the second from 3 November 2020 to 5 April 2021) and the comparison periods (i.e., the first from 16 March to 2 June 2018 and the second from 3 November 2018 to 5 April 2019) were identified using regional healthcare databases. The distribution of births according to the selected outcomes was computed and the Chi-square test was used for testing differences in the periods compared. During the two lockdowns, we observed a lower proportion of low birth weight, from 6.8% in the comparison period to 6.1% in the first lockdown ( = 0.019), and from 6.5% to 6.1% in the second one ( = 0.109). The proportion of preterm births decreased from 6.8% to 6.3% in the first lockdown ( = 0.097), and from 6.2% to 6.0% in the second one ( = 0.172). No differences in stillbirth rate emerged for both lockdowns. Induction of labor was more frequent during both lockdowns, from 28.6% to 32.7% in the first ( < 0.0001), and from 29.9% to 33.2% in the second one ( < 0.0001). Cesarean section was less frequent during the second lockdown.