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Concurrently, however, the case-fatality rate decreased from 35.5 deaths per 10,000 cases in 1970 to 2.6 per 10,000 cases in 1992.
(See Epidemiology.) The increased incidence of ectopic pregnancy has been partially attributed to improved ability in making an earlier diagnosis.
Patients with chlamydial infection have a range of clinical presentations, from asymptomatic cervicitis to salpingitis and florid PID.
More than 50% of women who have been infected are unaware of the exposure.
(See Etiology.) Nontubal ectopic pregnancies are a rare occurrence, with abdominal pregnancies accounting for 1.4% of ectopic pregnancies and ovarian and cervical sites accounting for 0.2% each.
Some ectopic pregnancies implant in the cervix ( An ectopic pregnancy requires the occurrence of 2 events: fertilization of the ovum and abnormal implantation.
Transvaginal ultrasonography, or endovaginal ultrasonography, can be used to visualize an intrauterine pregnancy by 24 days post ovulation or 38 days after the last menstrual period (about 1 week earlier than transabdominal ultrasonography).