Some infertile patients are diagnosed with unilateral or bilateral tubal block by hysterosalpingography (HSG). Laparoscopy is considered as the next step in its investigation and the tubes may be found patent in some of the cases confirming false positive for the HSG. Patients with confirmed bilateral tubal block (BLTB) have no option but to undergo in-vitro fertilization. https://foldlyers.shop/product-category/samsung-gs20/