Final answer:
Septic pelvic thrombophlebitis is a serious condition resulting from an infected blood clot in the pelvic veins, often following childbirth or surgery, and is related to PID, which can be caused by sexually transmitted infections.
Step-by-step explanation:
Septic pelvic thrombophlebitis is a rare but severe complication that occurs when a blood clot, infected by bacteria, develops in the pelvic veins. This condition typically follows childbirth, pelvic surgery, or can be a complication of pelvic inflammatory disease (PID). Septic pelvic thrombophlebitis is associated with infections, most often sexually transmitted ones such as gonorrhea and chlamydia, which can lead to PID. Symptoms of PID can be variable and may include pain in the lower abdomen, vaginal discharge, fever, and painful urination. In severe cases, PID can cause scarring and blockage of the fallopian tubes, leading to infertility.