First pregnancy not protected, later had an ectopic pregnancy, what is the reason?

Patient's question:

What should I do if I get pregnant unexpectedly? The harm is relatively small. Why did I not get pregnant the first time and later had an ectopic pregnancy?

Doctor's answer:

In normal pregnancy, the fertilized egg implants within the uterine cavity. When the fertilized egg implants outside the uterine cavity, it is referred to as ectopic pregnancy or tubal pregnancy. Over 95% of ectopic pregnancies occur in the fallopian tubes, and they are pathologically classified into four types: in situ growth, abortion, translocation growth, and rupture. These four types are interrelated under certain conditions. For example, if the in situ growth type is not treated promptly, it may progress to rupture or abortion. Misdiagnosed abortion cases may partially transform into translocated growth types that implant in the abdominal cavity, while untreated translocated growth types can develop into rupture. Among these types, rupture is the most dangerous. Misdiagnosis or delayed treatment can lead to life-threatening internal bleeding, accounting for the majority of pregnancy-related deaths. Therefore, timely diagnosis and appropriate management are particularly crucial.

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