NAZIA LIAQAT, NAHEED AKHTAR, SAIRA SHAGUFTA, SALMA LIAQAT, and SYEDA SITWAT FATIMA. “FREQUENCY OF BILATERAL TUBAL OBSTRUCTION AND COMMON FACTORS LEADING TO IT AMONG WOMEN PRSESENTING WITH SECONDARY INFERTILITY”. Journal of Saidu Medical College, vol. 6, no. 1, June 2016, pp. 766-70, doi:10.52206/jsmc.2016.6.1.766-770.