Davis M S
NAACOGS Clin Issu Perinat Womens Health Nurs. 1992;3(2):280-90.
Natural family planning includes the calendar (rhythm), basal body temperature, ovulation (mucus), and sympto-thermal methods. Reliability of such methods often is underestimated, but effectiveness of various methods has been reported. Correct understanding and use of proper techniques, primarily abstinence during fertile periods, is imperative for effectiveness. New methods being studied may heighten awareness of fertile times and shorten required periods of abstinence or use of back-up methods.
自然计划生育包括日历（节律）法、基础体温法、排卵（黏液）法和症状体温法。这些方法的可靠性常常被低估，但已有关于各种方法有效性的报道。要想取得成效，正确理解并运用恰当的技巧至关重要，主要是在易孕期禁欲。正在研究的新方法可能会提高人们对易孕期的认识，并缩短所需的禁欲期或备用方法的使用时间。
