Most frequent site of tubal ectopic pregnancy is

Nearly 95 percent of ectopic pregnancies are implanted in the various segments of the fallopian tube. The ampulla (70 percent) is the most frequent site, followed by isthmic (12 percent), fimbrial (11 percent), and interstitial tubal pregnancies (2 percent).The remaining 5 percent of non-tubal ectopic pregnancies implant in the ovary, peritoneal cavity, cervix, or prior cesarean scarReference: William's Obstetrics; 25th edition; Chapter 19; Ectopic pregnancy