Objective To demonstrate that delayed cord clamping (DCC) is safe in mothers with confirmed SARS-CoV-2 infection. Design, setting and participants Prospective observational study involving epidemiological information from 403 pregnant women with SARS-CoV-2 between 1 March and 31 May 2020. Data were collected from 70 centres that participate in the Spanish Registry of COVID-19. Methods Patients' information was collected from their medical chart. Main outcomes and measures The rate of perinatal transmission of SARS-CoV-2 and development of the infection in neonates within 14 days postpartum. Results The early cord clamping (ECC) group consisted of 231 infants (57.3%) and the DCC group consisted of 172 infants (42.7%). Five positive newborns (1.7% of total tests performed) were identified with the nasopharyngeal PCR tests performed in the first 12 hours postpartum, two from the ECC group (1.7%) and three from the DCC group (3.6%). No significant differences between groups were found regarding neonatal tests for SARS-CoV-2. No confirmed cases of vertical transmission were detected. The percentage of mothers who made skin-to-skin contact within the first 24 hours after delivery was significantly higher in the DCC group (84.3% versus 45.9%). Breastfeeding in the immediate postpartum period was also significantly higher in the DCC group (77.3% versus 50.2%). Conclusions The results of our study show no differences in perinatal outcomes when performing ECC or DCC, and skin-toskin contact, or breastfeeding.

OBJECTIVE: To demonstrate that delayed cord clamping (DCC) is safe in mothers with confirmed SARS-CoV-2 infection. DESIGN, SETTING, AND PARTICIPANTS: Prospective, observational study involving epidemiological information from 403 pregnant women with SARS-CoV-2 between March 1st and May 31st, 2020. Data were collected from 70 centers that participate in the Spanish Registry of COVID-19. MAIN OUTCOMES AND MEASURES: The rate of perinatal transmission of SARS-CoV-2 and development of COVID-19 disease in neonates at day 14 of the delivery. RESULTS: The Early cord clamping (ECC) group consisted of 231 infants (57.3%), whereas the DCC group consisted of 172 infants (42.7%). A total of 5 positive cases (1.7% of total tests performed) were identified with the nasopharyngeal PCR tests, 2 from the ECC group (1.7%) and 3 from the DCC group (3.6%). No significant differences between groups were found regarding neonatal tests for COVID-19. No confirmed cases of vertical transmission were detected. The percentage of mothers who made skin-to-skin contact within the first 24 hours after delivery was significantly higher in the DCC group (84.3% versus 45.9%). Breastfeeding in the immediate postpartum period was also significantly higher in the DCC group (77.3% versus 50.2%). CONCLUSIONS: The results of our study have been similar to early cord clamping practices, no skin-to-skin contact, and suppression or delay of breastfeeding.