ABSTRACT
Objective: The study aimed to examine the effect of chronotype differences on sleep quality and pregnancy symptoms in pregnant women. Material and Methods: Eighty-five pregnant women in the second trimester were included in the study. The chronotypes of pregnant women were determined using the Morningness-Eveningness Questionnaire (MEQ). Then, Oral Glucose Tolerance tests (OGTT) were performed on the participants between 24-28 weeks. Also, pregnant women's nausea and vomiting conditions were evaluated with the Pregnancy-Unique Quantification of Emesis and Nausea (PUQE) and sleep quality with the Pittsburgh Sleep Quality Index (PSQI). Results: A significant difference was found when OGTT-fasting glucose and 2-hour glucose values were compared between groups (p<0.05). When the differences between the morningness chronotype (MC) and intermediate chronotype (IC) groups were compared, there was no significant difference between the two groups (p>0.017). When the MC group was compared with the eveningness chronotype (EC) group, OGTT fasting glucose values were statistically lower (p<0.017). Also, the differences in PUQE scores of the MC group were significantly lower than the IC and EC groups (p<0.017). When PSQI values were compared between the groups, a statistically significant difference was found (p<0.05). In the PSQI post-hoc comparison, the MC group was statistically significantly lower in both the IC and EC groups (p<0.017). It was also seen that the IC group was statistically significantly lower than the EC group (p<0.017). Conclusion: The present results showed that pregnant women with evening chronotypes had significantly worse sleep quality. Also, chronotype differences are a potential connection affecting sleep quality and pregnancy symptoms.