Necrozoospermia is the presence of dead spermatozoa in the semen, which may be due to poor seminal quality caused by, for example, severe infections, external factors such as alcohol consumption and other drugs, treatments such as radiotherapy and chemotherapy, hormonal treatments to increase muscularity (anabolic steroids) and also low frequency of ejaculation.
On the contrary, ectopic pregnancy is the implantation of a pregnancy