What are the causes of cervical canal pregnancy

Cervical tube pregnancy may be caused by abnormal fallopian tube function, history of uterine cavity operation, endometrial injury, application of assisted reproductive technology, abnormal anatomical structure of cervical tube, and other reasons. Cervical canal pregnancy refers to an abnormal pregnancy state in which the fertilized egg implants and develops inside the cervical canal, and belongs to a special type of ectopic pregnancy.

1. Abnormal fallopian tube function

Weakened fallopian tube peristalsis or abnormal ciliary oscillation may cause obstruction of fertilized egg transport and prevent it from entering the uterine cavity normally. Inflammation of the fallopian tubes or a history of previous surgeries may cause adhesions or narrowing of the tubes, increasing the risk of abnormal implantation of fertilized eggs. This situation requires timely medical evaluation of the fallopian tube function status.

2. History of uterine cavity operations

Multiple induced abortions, curettage, and other uterine cavity operations may damage the endometrial basement membrane, leading to an unsuitable uterine environment for embryo implantation. Repeated intrauterine operations may cause adhesions in the uterine cavity, forcing the fertilized egg to choose another site for implantation. It is recommended that women with a history of intrauterine procedures undergo hysteroscopy before preparing for pregnancy.

3. Endometrial injury

Chronic endometritis, endometrial tuberculosis, and other diseases may lead to a decrease in endometrial receptivity. When the endometrium is too thin or there is scar tissue, it is difficult for the fertilized egg to implant normally. This type of situation requires treatment of underlying diseases before considering pregnancy.

4. Application of Assisted Reproductive Technology

Embryo transfer operations in assisted reproductive technologies such as in vitro fertilization may increase the risk of ectopic implantation of embryos. Excessive number of embryos transferred or too deep insertion of the transfer tube can lead to the embryo entering the cervical canal. After assisted reproductive technology, it is necessary to closely monitor the location of pregnancy.

5. Abnormal anatomical structure of cervical canal

Congenital cervical canal elongation or cervical incompetence may increase the probability of fertilized eggs being retained in the cervical canal. Space occupying lesions such as cervical fibroids or polyps may alter the morphology of the cervical canal, creating conditions for embryo implantation. This type of anatomical abnormality requires a clear diagnosis through gynecological examination. Cervical canal pregnancy is a high-risk pregnancy, and once diagnosed, immediate medical treatment is required. Daily attention should be paid to avoiding unnecessary uterine cavity operations, actively treating gynecological inflammation, and following medical advice for regular follow-up after assisted reproductive technology. Before preparing for pregnancy, it is recommended to complete gynecological examinations to evaluate the condition of the reproductive system. If abnormal vaginal bleeding occurs in early pregnancy, timely medical attention should be sought to rule out ectopic pregnancy. Maintaining good lifestyle habits and avoiding bad habits such as smoking and alcohol abuse can help maintain reproductive system health.