<prompt> Ampullary pregnancy ruptures generally at___ weeks6812-Oct16  <response>: Ans. is b i.e., 8 Implantation within the tubal segment that penetrates the uterine wall results in an interstitial pregnancy. These account for about 3 of all tubal gestations. Rupture may not occur until up to 16 weeks. Ampullary pregnancy generally ruptures at 8 weeks and isthmic at 6 weeks. 