To evaluate the outcome of seminal ductal patency rate with different predictors after reconstructive surgery . Patients and Methods : This study comprised 40 patients (mean age 31.5 years, range 21-41 years), 30 patients operated upon with various reconstructive surgery (mainly epididymovasostomy ) for obstructive azoospermia and 10 patients were inoperable . All the patients followed for 1 year by semen analysis every 4 months . The patient's findings will be correlated with different factors that affect the surgical outcome. Results: Of 30 azoospermic patients due to operable causes , sperms appeared in seminal fluid in 15 patients (50%) postoperatively . Irrespective to the type of surgery, factors affecting patency rate are studied and correlated with the patency rate. Conclusion: Although all techniques performed by microsurgery the success rate was low. The most important predictive factor is the demonstration of sperms in the epididymal fluid