Ectopic pregnancies are referred to as:
Implantation of embryo at site other than uterus.
Implantation of defective embryo in the uterus
Pregnancies terminated due to hormonal imbalance.
Pregnancies with genetic abnormality.
Ectopic pregnancy refers to the situation in which the fertilised egg implants itself outside of the uterus. The fertilised egg passes through the fallopian tube and adheres to the uterine lining normally. Ectopic pregnancy typically happens when the egg is placed in one of the fallopian tubes. So, it is also known as a tubal pregnancy. The fallopian tube is unable to support the expanding uterus, which could cause serious issues with foetal development. Therefore, "Implantation of embryo at site other than uterus" is the right response.