This prospective observational study aimed to evaluate the relationship between menstrual phase cycles and gastric emptying in female volunteers of reproductive age.

Volunteers included in the study will be evaluated for gastric emptying with USG in both phases of the menstrual phase. In each phase, volunteers will be evaluated for gastric emptying of both liquid food intake and a light meal. At first, 400 ml of water will be drunk after 10 hours of fasting, and gastric content will be evaluated with USG after 2 hours.

Secondly, after 10 hours of fasting, solid food intake will be evaluated. Then, after taking a light meal (toast and 200 ml tea), the volunteers will be evaluated by USG at the 6th hour.

Inclusion Criteria:

• Female volunteers of reproductive age have had a regular menstrual cycle for at least six months

Exclusion Criteria:

• Pregnancy
• Stomach problem
• Using anticholinergics, opioids, and oral contraceptive drugs
• Hypothyroidism
• Diabetes mellitus
• Smokers

female volunteers with active menstrual cycles

24 healthy female volunteers who are of the reproductive age and have had a regular menstrual cycle for at least six