semana gestacional. Observou-se diminuição significativa da frequência mensal do relacionamento sexual do casal, que passou de uma mediana de 12 para 4 vezes por mês (Z =-10,56; p<0,001). A disfunção sexual se mostrou presente em 35,7% das gestantes avaliadas, e a qualidade de vida dessas foi inferior quando comparada àquelas com função sexual sem alteração (Z=-2,87; p=0,004). CONCLUSÃO: Os resultados do presente estudo mostram que a disfunção sexual afetou negativamente a qualidade de vida de mulheres grávidas, devendo ser um aspecto relevante para ser avaliado durante as consultas de pré-natal. AbstractPURPOSE: To investigate the relationship between sexual function and quality of life in pregnant women living in two cities of Northeastern Brazil. METHODS: The sample consisted of 207 pregnant women. The data were collected through a questionnaire containing questions about socio-demographic, gynecological and obstetrical data, body and sexual knowledge. Quality of life was assessed by applying the Ferrans & Powers Quality of Life Index (QLI Ferrans and Power). Sexual function was assessed using the Female Sexual Function Index (IFSF). Data were statistically analyzed using the Shapiro-Wilk, Mann-Whitney and Wilcoxon tests. RESULTS: The pregnant women studied had a median age of 30 years (quartile 26-33 years) and were approximately at the 26 th gestational week. A significant decrease in the monthly frequency of sexual relations of the couple was observed, with a median of 12 to 4 times per month (Z=-10.56; p<0.001). Sexual dysfunction was detected in 35.7% of the pregnant women studied, whose quality of life was lower when compared to women with unchanged sexual function (Z=-2.9; p=0.004). CONCLUSION: The results of this study show that sexual dysfunction negatively affected the quality of life of pregnant women, and this should be an important aspect for review during prenatal consultations.