Table 2.

Inclusion and exclusion criteria

Inclusion criteria	Exclusion criteria
Articles that studied oral alterations and included women of reproductive age using hormonal contraceptives.	Articles that did not include women of reproductive age using contraceptives or articles that did not study oral alterations in women of reproductive age using contraceptives.
Articles in English or Spanish	Articles in a language other than English or Spanish
Observational studies (case-control, cohort, cross-sectional, longitudinal)	Clinical cases, systematic reviews, and meta-analyses
Studies conducted in humans	In vitro or animal studies
Articles published within the last 21 years.	Articles published more than 21 years ago.
Articles studying oral manifestations diagnosed by medical professionals.	Articles studying oral manifestations not diagnosed by medical professionals.