宫颈内口松弛的病因有哪些呢?What is the etiology of cervical inner mouth flabby?

　　陈凤林教授指出：造成宫颈内口松弛症的原因可分为两类：先天性和后天性。

　　Professor Chenfenglin pointed out that the causes of cervical cavity relaxation can be divided into two categories: congenital and acquired.

　　先天性宫颈内口松弛症是由于母亲怀孕时服用了某种药物或其它原因造成女性子宫发育不全;后天性宫颈内口松弛症则是由于产伤、刮宫次数过多或频繁的会阴检查。

　　Congenital intracervix relaxation is caused by a woman's uterine hypoplasia due to a drug or other cause taken by the mother during pregnancy; Acquired cervical cavity relaxation is due to injury, excessive number of curettage or frequent perineum examination.

　　另外，宫颈短可能也是宫颈内口松弛症的原因之一。有报道表明，超声波检查宫颈变短时，妊娠发生流产或早产的机率会大大增加。但有可能安然度过妊娠期，顺利产子。而且，宫颈的长度受很多因素影响，如宫颈的肌肉与纤维的比例，妊娠时随着子宫的增大向腹腔内伸展也有可能导致宫颈变短。会不会导致流产的发生还得综合评断，四D彩超动态观是比较理想的选择。

　　In addition, cervical shortness may also be one of the causes of cervical oral relaxation. It has been reported that when ultrasound examination of the cervix is shorter, the chance of miscarriage or premature birth in pregnancy is greatly increased. But it is possible to survive the pregnancy and successfully produce children. Moreover, the length of the cervix is affected by many factors, such as the ratio of muscles to fibers of the cervix. The extension of the cervix to the abdominal cavity during pregnancy may also cause the cervix to shorten as the uterus increases. Will not lead to the occurrence of miscarriage must also be comprehensive evaluation, four D color hyperdynamic view is an ideal choice.