Health encyclopaedia - Alphabetical Topic List健康百科全书-按字母顺序排列的主题清单

| A | | 1 | | B | | b | | C | | 人才招聘 | | D | | | | E | | 电子 | | F | | f | | G | | 克 | | H | | h | | I | | 我 | | J | | j | | K | | k | | L | | 升 | | M | | 米 |
| N | | n | | O | | o | | P | | p | | Q | |常见问题 | | R | | 研究 | | S | | | | T | | 吨 | | U | | u | | V | | v | | W | | 瓦特 | | X | | x | | Y | | y |

Disadvantages of Natural family planning缺点自然计划生育

The disadvantages are:弊端是：

  • It relies heavily on the ability to accurately work out the fertile periods each month.  If the indicators are not correctly calculated the method has a high risk of failure.这很大程度上依赖于能够准确计算出肥沃的时期，每个月如果指标是不正确的计算方法具有较高的失败的风险。
  • It demands a high level of organisation and it will take as long as six months to discover the fertile period.  During this time, the diary of indicators must be keep every day to ensure that the records are accurate.它要求高水平的组织和将采取什么只要六个月发现肥沃的时期。在这段时间内，日记的指标，必须保持每天以确保该记录是准确的。
  • The indicators may be hard to understand if the woman is tired, stressed or ill.该指标可能很难理解，如果该名女子是疲倦，强调或虐待。
  • It does not provide either partner with protection against infection of sexually transmitted diseases.它没有提供任何合作伙伴与保护，以免感染性病。