Received: 5 September 2021
Accepted: 9 March 2022
First Online: 18 March 2022
: The project “Born in Belo Horizonte: Survey on childbirth and birth” was approved by the Research Ethics Committee of the Universidade Federal de Minas Gerais (UFMG), under Opinion CAAE-0246.0.203.000. All puerperal women and directors of each maternity hospital signed the Free and Informed Consent Term, according to the ethical guidelines described in Resolution No. 466, of December 12, 2012, of the National Health Council, which involve research with human beings. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.