An inflammation caused by veneral disease is sterilizing 40,000 to 50,000 women a year in the United States, according to doctors at the Center for Disease Control. "There is no question that we are seeing signs of an infertility epidemic," said Dr. James Curran of the CDC's VD control division. Called pelvin inflammatory disease, or PID, the disorder is an inflammation of a woman's fallopina tubes, which carry eggs from the ovaries to the womb. The tubes can become blocked and sometimes they and associated reproductive organs must be removed. Curran said that PID occurs mainly in women ages 18 to 24, who initially do not worry about infertility. A few years later, when they want to have children, they discover they can't, he said. The problem is becoming acute now because of the upsurge of VD in the 1960s and '70s. Said the CDC's Dr. Ronald K. St. John, "There are other problems associated with PID, but VD is the main cause." St. John said 15 to 17 percent of all women who contract gonorrhea, a major type of veneral disease, will develop PID. Of those, about 10 percent will become sterile. PID is also a complication of another type of VD known as nonspecific gonococcal urethritis, he said. In addition to infertility, PID can cause pain, menstrual disorders and ectopic pregnancy, in which the fetus starts growing in the fallopian tube instead of the womb. Ectopic pregnancy can lead to rupturing of the tube and other serious problems and can jeopardize the life of the mother. At the same time, a panel of experts meeting at the CDC last week noted that mutant strains of "super gonorrhea," resistant to all currently used antibiotics, have emerged in the Philippines and are, in St. John's words, "rapidly galloping forward." Penicillin-resistant types are already well established in the Far East, and cases are turning up in the United States, mostly in California. CDC's Dr. Paul Wiesner said that these types have "failed to become established anywhere in the country." About 900 cases have been reported since 1976, compared to 1 million penicillin treatable cases annually.