What is the most common anatomical site of ectopic pregnancy implantation?

• A Isthmus of the fallopian tube
• B Cervix
• C Fimbrial end of the fallopian tube
• D Ampulla of the fallopian tube ✓

Explanation

About 70 percent of tubal ectopics implant in the ampulla, the widest part of the tube where fertilisation normally occurs. The isthmus accounts for roughly 12 percent and tends to rupture earlier because of its narrow lumen. Fimbrial and ovarian sites are uncommon, and cervical pregnancy is rare. Ampullary implantation also explains why most ectopics present between 6 and 8 weeks rather than very early.

Reference: Williams Obstetrics, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.