Ectopic pregnancy is a high-risk condition in gynecology. Like normal pregnancy, it causes amenorrhea and early pregnancy symptoms (such as vomiting, dizziness, nausea). However, ectopic pregnancy also presents with abdominal pain and vaginal bleeding. Its clinical symptoms are often atypical, leading to potential misdiagnosis or missed diagnosis, which increases the inherent risks.
Ectopic Pregnancy Threatens Women's Health and Life
Experts note: Ectopic pregnancy, also known as extrauterine pregnancy, most commonly occurs in the fallopian tubes (over 90% of cases), making it the most dangerous type. Fallopian tube pregnancy has two possible outcomes: either the embryo migrates into the abdominal cavity, resulting in a tubal pregnancy miscarriage, or it causes a tubal pregnancy rupture.
Surgical removal of the fallopian tube may partially impair fertility. Early detection allows for conservative treatment, enabling most patients to achieve intrauterine pregnancy.
What factors contribute to ectopic pregnancy?
1.Chronic Salpingitis
Chronic salpingitis is one cause of ectopic pregnancy. It can lead to adhesions in the tubal mucosal folds, causing luminal narrowing, mucosal damage, loss of epithelial cilia, peritubal adhesions, and tubal distortion. These conditions impair the normal transport and passage of the fertilized egg through the fallopian tube, making it a primary cause of tubal ectopic pregnancy.
2. Tubal Developmental or Functional Abnormalities
Ectopic pregnancy is associated with abnormal tubal development or function. Tubal developmental anomalies such as excessive length, muscular hypoplasia, absence of mucosal cilia, double fallopian tubes, or ectopic fimbrial ends can all predispose to ectopic pregnancy.
3. Tubal ligation, electrocoagulation, or loop ligation
Following tubal surgery—whether ligation, electrocoagulation, or loop ligation—the formation of tubal fistulas or recanalization may lead to ectopic pregnancy.Recanalization procedures or tubal reconstruction after sterilization may also cause ectopic pregnancy due to scar tissue narrowing the lumen and impairing patency. 4. History of ectopic pregnancy Women with a prior ectopic pregnancy have a significantly higher risk of recurrence.
5. Repeated abortions
Evidence shows that the more abortions a woman has, the greater her risk of ectopic pregnancy. Therefore, effective contraception is crucial.
6. In vitro fertilization (IVF)
Statistics indicate that IVF carries a 5%-8% risk of ectopic pregnancy. This occurs because when the fertilized egg is placed in the uterine cavity on day three, it may take an additional 3-4 days to find a suitable implantation site.During this period, factors like endometritis may disrupt the uterine environment, causing the fertilized egg to implant in the fallopian tube instead, resulting in ectopic pregnancy.
7. Fallopian Tube Inflammation
Approximately 60% of ectopic pregnancy patients have a history of salpingitis.Recurrent chronic inflammation causes adhesions in the tubal mucosal folds, narrowing the lumen, damaging cilia, or twisting the fallopian tube due to adhesions with surrounding tissues. This impairs normal peristalsis, obstructing the fertilized egg's journey and preventing its timely arrival in the uterine cavity, leading to implantation in the fallopian tube.
8. Tubal malformations or prior tubal surgery
Abnormally long fallopian tubes, tubal reanastomosis after sterilization, or tubal reconstruction procedures may all increase ectopic pregnancy risk.
9. IUD placement
Data indicates that approximately 3% of women with an intrauterine device (IUD) still experience pregnancy. Therefore, if you have an IUD and develop abdominal pain, ectopic pregnancy should be considered.