“natural family planning”的概念、定义、翻译、参考文献-科学参考

单词	natural family planning
释义	natural family planning Encyclopedia 医学避孕释 natural family planning自然避孕法根据女性月经周期和周期中出现的症状与体征，间接判断排卵过程，识别排卵前后的易受孕期，进行周期性禁欲而达到避孕的方法。又称安全期避孕法。
随便看	orthonormal polynomials orthonormal sequence orthonormal set orthonormal system orthonormal system of functions orthonormal system of vectors orthonormal tetrad orthonormal transformation orthonormal vectors orthonormal wavelet orthopaedic polymer orthopanchromatic film ortho-para conversion ortho/para directing ortho para directing group ortho-para directing group ortho-para equilibrium ortho-para hydrogen conversion system ortho-para ratio orthopedic bone plate orthopedic bone screw orthopedic bone wire orthopedic pin orthopedics orthopedic shoes（pad）

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