PRL and migraine disorder: Although studies evaluating prolactin levels in subjects with migraines have shown different results, taken as a whole, our results on the levels of prolactin in migraineurs compared to controls appear to be corroborated by previous evidence in this field (Cavestro et al., 2006; Li et al., 2018; Nattero et al., 1986; Taha & Mohammed, 2019; Vega et al., 2017).