Appendectomy is the most common emergent operative procedure performed worldwide. In this study investigators will investigate if there is a relationship between breast feeding and appendicitis in adults.

Acute appendicitis accounts for the commonest indication for emergency visits during daily surgical practice. Breast feeding is very important both mother and the child. For the infant, breast feeding has an important role on the maturity of immune system. In the literature search, there are a little studies about the relationship between the breast feeding and appendicitis. In the literature, some studies suggests that the breast feeding may possibly give protection against the development of appendicitis. But the number of the patients and the control groups are limited. Because of that the investigators have planned to make this study with a lot of number of patients.

Inclusion Criteria:

• Subjects has pathologically proven appendicitis for appendicitis group.

Exclusion Criteria:

• Subjects has American Society of Anesthesiologists Physical Status classification 4,
• Subject has pregnancy,
• Subject has malignity,
• Subject has chronic illness,
• Subjects who won't accept to join the study
• Subjects who don't have family members

500 patients who has pathologically proven appendicitis, and 1000 participants without appendicitis.

Because the time period of this study is very short