2.2 Definitions and Participants
This study was conducted in a maternity hospital located in Recife, Brazil, from July 2018 to January 2019.
Inclusion criteria were low- and high-risk parturients in the second stage of labor, between 19 and 45 years old and 37 to 42 gestational weeks. Were excluded from the study multiparous women, those with dead fetuses, history of analgesia, induced delivery, or using psychoactive drugs.