如果从精子钻进卵细胞里开始推算,直到发育形成一个成熟的胎儿,最后向子宫告别,哇哇坠地,大约需要二百六十六天左右。在这将近九个月的时光里,一般说来,绝大多数孕妇的妊娠经过是平顺的。但也有一部分孕妇在孕期的某个阶段出现各种异常情况,其中阴道出血,就是常见的异常情况。无论出血来自子宫腔、子宫颈或阴道,最后总要通过阴道流出,所以,医学上习惯把未确切查明部位的出血泛称阴道出血。概括地说,凡是孕期发生阴道出血,多半是妊娠出现了故 If sperm into eggs from the beginning, until the development of the formation of a mature fetus, the final bid farewell to the uterus, wah-wah, it will take about two hundred and sixty-six days. During this nearly nine-month period, in general, most pregnant women have a smooth pregnancy. But there are also some pregnant women in a certain stage of pregnancy there are various anomalies, including vaginal bleeding, is a common exception. Regardless of bleeding from the uterine cavity, cervix or vagina, the final outflow through the vagina, therefore, the medical practice of the bleeding is not exactly part of the known bleeding vaginal bleeding. In a nutshell, vaginal bleeding occurs during pregnancy, most of the pregnancy has occurred