摘要
Ectopic pregnancy, in which the fertilized ovum implants on any tissue other than the endometrium, is the most common life-threatening emergency in the first trimester of pregnancy. The incidence of ectopic pregnancy is 0.25%-1.0% of all pregnancies, and has increased greatly in the last few decades, from 4.5 per 1000 pregnancies in 1970 to an estimated 19.7 per 1000 pregnancies in 1992.^1
Ectopic pregnancy, in which the fertilized ovum implants on any tissue other than the endometrium, is the most common life-threatening emergency in the first trimester of pregnancy. The incidence of ectopic pregnancy is 0.25%-1.0% of all pregnancies, and has increased greatly in the last few decades, from 4.5 per 1000 pregnancies in 1970 to an estimated 19.7 per 1000 pregnancies in 1992.^1
