Final answer:
Implantation in the uterus is not a characteristic of ectopic pregnancy. Ectopic pregnancies involve implantation in areas other than the uterus, such as the fallopian tube, ovaries, or the abdominal cavity.
Step-by-step explanation:
The pathology of an ectopic pregnancy includes several factors, except for one. An ectopic pregnancy is characterized by the implantation of an embryo outside the uterine cavity. The common locations for ectopic implantation include the fallopian tube (tubal pregnancy), the ovaries (ovarian ectopic pregnancy), and the abdominal cavity (abdominal ectopic pregnancy). Therefore, the correct aspects of ectopic pregnancy include a. Ruptured fallopian tube, c. Abnormal gestational sac, and d. Trophoblastic tissue. However, b. Implantation in the uterus is not a characteristic of an ectopic pregnancy, as this would represent a normal pregnancy, where the embryo implants within the uterus.