Allocation of the Best Day for Detection of the Dominant Follicle by Serial Sonography on Infertile Women on Comiphen Citrate

In order to reduce the number of sonography examinations, as well as costs and anxiety associated with this procedure, this study was conducted for allocation the best day for performing this procedure in order to identify the dominant follicle. In this cross sectional descriptive study one handred infertile females received 100 mg clomiphen citrate from day 3 to 8 of the menstural cycle. The diameter of the dominant follicle as well as endometrial thickness were measured daily by serial sonography from day 12 to 15 of cycle. The diameter of the follicle in 70% of cases was 15 to 30 mm on day 13 of the menstrual period. The minimum measurement of endometrial thickness was on day 12 in 84% of the cases. While the maximum measurement was on day 15 in 67 % of cases. Thirty six percent of the patient did ovulate mainly on day 14 of menstural cycle. There was a positive correlation between the growth of the follicle with increase in endometrial thickness in 31% of patients, which was meaningful on day 14 of menstural cycle (p<0.05). The findings from this suggest that the best day for prediction the probibility of ovulation by a single sonoraphy eximation is on day 13 of the cycle.