Received: 23 September 2021
Revised: 3 February 2022
Accepted: 7 February 2022
First Online: 21 February 2022
: The authors declare no competing interests.
: This study was conducted according to the guidelines laid down in the Declaration of Helsinki and all procedures involving participants were approved by the Institutional Review Board of the School of Public Health of the University of São Paulo (protocol number 872.613/2014). Written informed consent was obtained from all participants. In case of teenage pregnancies, the adolescent’s legal guardian provided consent.