| 题名 | Cervical mucus: the biological marker of fertility and infertility. |
| 作者 | JJ Billings |
| 杂志 | 《International Journal of Fertility》 |
| 年|卷|期 | 1981,26(3) |
| 页码 | 182-195 |
| 链接 | https://www.ncbi.nlm.nih.gov/pubmed/6118338 |
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