The Frequency of Celiac Disease and Its Association with Infertility in Women Attending Infertility Clinics: A Case-Control Study in Southern Iran

Background: Celiac disease (CD) is a multifactorial systemic disease that causes enteropathy and can lead to a wide spectrum of disorders related to infertility. Objectives: This case-control study aimed to evaluate the frequency of celiac disease (CD) and its association with infertility in women. Methods: This study was conducted on women referred to Ghadir Mother and Child Hospital in Shiraz. Women with infertility served as the case group, while fertile women comprised the control group. Blood samples were collected from participants, and tissue anti-transglutaminase (Anti-TTG Ab) levels were measured. Patients with elevated Anti-TTG Ab levels were referred for duodenal biopsy. Results: One hundred subjects were enrolled in the case group and 200 in the control group. Eight patients in the case group tested positive for serology, and four of these had duodenal biopsies confirming CD. In the control group, one individual tested positive for serology, but the duodenal biopsy was negative (P for between-group differences: 0.001 for serology and 0.012 for biopsy results). There was a significant association between high levels of Anti-TTG Ab and infertility (odds ratio = 17.30, 95 % CI: 2.13 - 140.39), which remained even after adjusting for age and body mass index (odds ratio = 9.92, 95 % CI: 1.17 - 84.21). Conclusions: The frequency of CD was higher among infertile women compared to fertile women. Increased levels of Anti-TTG Ab were independently associated with infertility.