RESUMEN
There is scarce information related to transplacental antibody transfer against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) with different homologous and heterologous vaccination schemes. This study aimed to correlate the magnitude of transplacental transfer anti-SARS-CoV-2 antibodies in different homologous and heterologous schemes. An observational cross-sectional study was developed to identify pregnant women vaccinated against SARS-CoV-2. They were questioned about their immunization status; blood samples from the mother, umbilical cord during labor, and the newborn 72 h after birth were taken to measure anti-S1 and anti-S2 specific IgG antibodies for SARS-CoV-2. We recruited 104 women with a median age of 29 (SD 1.17). We found antibodies in all newborns with vaccinated mothers. Homologous BNT162b2 mRNA regimen had the highest mean (SD) antibody titers (AU/mL) in maternal (994.93 (3.08), p = 0.039), umbilical cord (1316.43 (2.79), p = 0.016), and newborn (1192.02 (3.55), p = 0.020) blood. The generalized linear model showed a positive effect over antibodies with at least one dose in maternal (ß = -1.1, p = 0.002) and newborn (ß= -0.717, p = 0.044) blood, and with two doses (ß = -0.684, p = 0.026) in umbilical cord blood. In conclusion, antibodies were detected in all vaccinated women and their newborns. Transfer of antibodies was found from the first dose, and the levels increased with the number of vaccine doses. Vaccination should be encouraged in pregnant women with any available scheme.
RESUMEN
Not available.
Asunto(s)
COVID-19 , Complicaciones Infecciosas del Embarazo , Femenino , Humanos , Recién Nacido , Transmisión Vertical de Enfermedad Infecciosa/prevención & control , Parto , Embarazo , Complicaciones Infecciosas del Embarazo/epidemiologíaRESUMEN
A 29 weeks' gestational age newborn, the product of a multiple gestation, was found to have a round mass in the umbilical cord; the resected lesion was an ectopic liver tissue (3 × 2 cm). She also had an imperforated hymen; otherwise, no other abnormalities were seen. The infant survived. Some possible mechanisms that may be associated with an ectopic liver tissue are presented.