laparoscopic tubal patency testing is used to detect causes of infertility and had 2 elements.   Firstly there is a Saline Infusion Sonography (HyCoSy) which is an ultrasound performed with dye that checks whether your fallopian tubes are open or blocked. 

Secondly a laparoscope is used to look at your abdominal and pelvic organs to help assess why you are having difficulty becoming pregnant. The laparoscopy will help find conditions that may affect fertility such as:

• endometriosis
• pelvic infection
• ovarian cysts
• fibroids