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宫颈粘液(以下简称CM)是主要由宫颈内膜细胞产生的复杂的分泌物,其中也含有少量子宫内膜、输卵管分泌的液体,可能还含有极少量滤泡液,此外,还有一些子宫内膜、宫颈上皮细胞及白细胞的碎片。正常育龄妇女的CM 在月经周期中有周期性变化,以利于排卵期精子的穿透并在阴道不利环境和存在吞噬的情况下保护精子,同时它还对精子进行“筛选”,滤去不正常和缺乏活动力的精子且在雌激素占优势时让活动力强的精子进入上生殖道。此外,宫颈管也是精子可能获能的部位和贮藏所。CM 还能保护宫腔免受外来细菌的感染。
Cervical mucus (hereinafter referred to as CM) is a complex secretion produced mainly by endocervical cells, which also contains a small amount of endometrial, tubal secretion of liquid, may also contain a very small amount of follicular fluid, in addition, there are some intrauterine Membrane, cervical epithelial cells and white blood cell fragments. Normal women of childbearing age in the menstrual cycle cyclical changes in order to facilitate the ovulation sperm penetration and in the vaginal adverse environment and the presence of phagocytosis under the protection of sperm, but it also sperm “screening”, the filter is not normal And lack of motile sperm and letting motile sperm enter the upper genital tract when estrogen predominates. In addition, the cervical canal is also likely to be sperm parts and storage. CM also protects the uterine cavity from external bacterial infections.