What can be the cause of blocked fallopain tubes?

What can be the cause of blocked fallopain tubes?

ectopic pregnancy

The most common cause of blocked fallopian tubes is pelvic inflammatory disease (PID). … Other potential causes of blocked fallopian tubes include: Current or history of an STD infection, specifically chlamydia or gonorrhea. History of uterine infection caused by an abortion or miscarriage

An infection of the female reproductive organs.
It usually occurs when sexually transmitted bacteria spread from the vagina to the womb (uterus), fallopian tubes or ovaries

Many cause but the most is PID STD ectopic pregnancy history utrine did miscarriage abortions UTI etc