Tubal pregnancy

The egg is fertilized in the ampulla of the fallopian tube, and the fertilized egg is blocked in the fallopian tube for some reason, but implants and develops in a part of the fallopian tube, and tubal pregnancy occurs. Typical cases have acute abdominal pain, short-term amenorrhea, and irregular vaginal bleeding, and most have a history of primary or secondary infertility. Ampulla pregnancy is the most common, accounting for 50 to 70%; followed by the isthmus, accounting for 30 to 40%; umbrella and interstitial are the least common, accounting for 1 to 2%.

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