The best way to prevent this from happening is to re-think your views about it Tubal blockage is one of the serious diseases after infection, which normally because of infection including pelvic inflammatory disease. Pelvic inflammatory disease is the most frequent reason for blocked fallopian tubes. Current or good reputation for an STD infection, specifically chlamydia or gonorrhea would also make the tubal blockage. The rate of tubal infertility has become reported to be 12% after one, 23% after two, and 53% after three instances of pelvic inflammatory disease. Even if PID is no longer present, a good PID or pelvic infection boosts the likelihood of blocked tubes. Blocked fallopian tubes can't seem to let the ovum and also the sperm converge, thus making fertilization impossible.