Abstarct: Purpose: The purpose of this study was to investigate the effect of fennel supplementation and water exercises on estrogen levels and some mextabolic parameters of type 2 diabetic women. Method: The present study was a randomized clinical trial with pre-test and post-test design with control group. The statistical population of the study consisted of all type 2 diabetic postmenopausal women. The sample was divided into 4 groups: 1) aerobic exercise in water + supplement of fennel supplement (14 subjects), 2) aerobic + placebo (15 subjects), 3) Supplemented with fennel (11) and 4) placebo (11). Menopausal Symptom Scale Questionnaire (MRS) was used to assess physical symptoms including four symptoms of hot flashes and night sweats, sleep problems, heart disease and musculoskeletal disorders. Individuals in each group received fennel supplements as 2 capsules of 100 mg twice daily. In this research, all stages of the training were conducted in the pool and in shallow water (3 sessions per week). To analyze the data, SPSS 16 software (dependent t test for intra group difference assessment, ANOVA test to evaluate the difference between groups and Tukey post hoc test to detect the groups that caused the difference in variance analysis at the significant level of 0/05) was used. Findings: The findings showed that the mean of estrogen, serum insulin, serum glucose, HDL and physical symptoms of menopause were significant in the groups. Results: The results show that fennel supplements and exercise exercises in water are effective in increasing the level of estrogen hormones and reducing diabetic symptoms and physical symptoms of menopause.