Flynn A M, McCarthy A M, Docker M, Royston J P
Department of Obstetrics and Gynaecology, Birmingham Maternity Hospital, UK.
Hum Reprod. 1988 Feb;3(2):201-5. doi: 10.1093/oxfordjournals.humrep.a136677.
Recent trends in family planning demonstrate an increasing interest in natural methods of birth regulation. In their present form, however, these methods are highly subjective and individualistic. A further trend in fertility programmes has been a very rapid development of technological methods to detect fertility in the female cycle, some of which could possibly benefit natural family planning users. One such technique--that of changing volumes of cervico-vaginal fluid (CVF), which is a mixture of cervical mucus and vaginal transudate--has been tested in a pilot study to ascertain its reliability to demarcate the fertile phase of the cycle. Results show that in all cycles tested, it is possible using the Rovumeter aspirator to detect the beginning of the fertile phase by rapidly increasing volumes of CVF; this volume reaches a peak approximately 1 day before ovulation detected by ultrasound and demonstrates an abrupt fall after ovulation and the onset of the infertile phase. From the results of this pilot study, we believe that, by the use of suitable algorithms and larger studies, it should be possible to develop a CVF volume method which could be offered as an objective alternative method for users of natural family planning and programmes.
计划生育领域的近期趋势表明，人们对自然生育调节方法的兴趣日益浓厚。然而，就目前的形式而言，这些方法具有很强的主观性和个体差异。生育计划的另一个趋势是，用于检测女性月经周期中排卵期的技术方法迅速发展，其中一些方法可能会使自然计划生育的使用者受益。一种这样的技术——即宫颈阴道液（CVF）量的变化，CVF是宫颈黏液和阴道渗出液的混合物——已在一项试点研究中进行了测试，以确定其划分月经周期中排卵期的可靠性。结果表明，在所有测试的周期中，使用罗伏计抽吸器能够通过CVF量的快速增加检测到排卵期的开始；该量在通过超声检测到排卵前约1天达到峰值，并在排卵后和非排卵期开始时急剧下降。根据这项试点研究的结果，我们认为，通过使用合适的算法并开展更大规模的研究，应该有可能开发出一种CVF量法，作为自然计划生育使用者和项目的一种客观替代方法。
