Uterine or fallopian (on behalf of the doctor Gabriel Fallopia, the first to describe their structure) tubes feed the embryo in the first days of its existence, as well as thanks to the cilia of the epithelium lining the walls, and their ciliated movements promote it into the uterine cavity. Its length is on average 11-12 cm. The fallopian tube is divided into 4 main segments:
- infundibul, the end of which is the mouth of the fallopian tube;
- ampular region;
- isthmic part; and
- intramural or interstitial part, which is located in the wall of the uterus. 
If the desired pregnancy does not occur for a long time, there is a suspicion of obstruction of the fallopian tubes. The prevalence of obstruction of the fallopian tubes is 19.1% in the primary infertility group and 28.7% in the secondary infertility group. It helps to reveal its diagnostic procedure, called hysterosalpingography (GHA).
Hysterosalpingogram (GHA) is a visualization method used to assess tubal patency in women with primary and secondary infertility. Tube pathologies can cause primary and secondary infertility. Based on several scientific studies, women with secondary infertility had a higher chance of obstruction of the fallopian tube with GHA than women with primary infertility., 
Among the risk factors for infertility, previous operations on the pelvic organs were significantly higher in the controlled study of Romero Ramas et al. The prevalence of transferred chlamydial infection was very significant in women with secondary infertility., 
In fact, hysterosalpingraphy is an x-ray using a contrast agent. It makes it possible to identify adhesions, myoma, other neoplasms, pressing on the outside and pinching the tube, or internal blockages due to tubal infections, congenital underdevelopment and other causes., 
Indications for x-ray of the fallopian tubes are also:
- stimulation of ovulation, when using drugs to increase the secretion of hormones necessary for the release of an egg from the ovary;
- artificial insemination procedure (IVF).