宮頸黏液法（比林斯法）
近年來，安全期避孕的另一種方式已經有了一定程度的流行，稱為“宮頸黏液法”或“比林斯法”(以其倡議者約翰和伊夫琳·比林斯的名字命名，為兩個澳大利亞婦科醫生)。該避孕方法根據對子宮頸黏液栓的觀察來判斷是否排卵。通常，黏液栓為不透明黏糊狀，可以阻止精子穿透；在排卵期，黏液栓變得清亮、粘滑、稀薄和更豐沛。一旦發生這樣的改變，黏液拴可以更容易被精子穿透，並且用兩個手指蘸上少許，它能伸展成長長的黏液絲。醫生把它稱之為“拉絲”("Spinnbarkeit"，
在德國為
“spinnability”)。這個測試加之保存下來的自我細緻的觀察記錄，因而可以顯示女子在什麼時候已經發生過排卵。隨著時間的推移，所積累下來的黏液栓性狀改變的資訊能夠用於預測受精期或“不安全”期，以避免在此期發生性交。如果沒有進一步指導和專業督察，這種方法確實對避孕還幫助不大。雖然如此，它仍然有一定的價值，並由此與“基礎體溫法”合併運用。安全期避孕的全部三種方法有其自身的缺陷，然而，不管如何，合併運用則會增大避孕的保險係數。
避孕效果：不太有效。 |
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宮頸黏液的變化：1.月經後不久：無黏液；2.排卵前不久：液化的黏液；3.排卵期：黏液在兩個手指之間能伸展成細細的拉絲(“Spinnbarkeit”)。
Changes in the cervical mucus: 1. Shortly after menstruation: no mucus. 2. Shortly before ovulation: liquifying mucus. 3. Ovulation: mucus can be stretched into a thin thread between two fingers
("Spinnbarkeit").
Credit: Etschenberg, K. and A. Pommerenke: Empfängnisregelung: Materialangebote für Schulen, Seelze, 2000
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Contraception |
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Methods
of Contraception:
Contraceptive
Methods for Women：“Rhythm”
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Billings Method
In recent years, another version of the rhythm method has gained some wider currency. Known as the "mucus method" or "Billings method" (after its original proponents,
John and Evelyn Billings, two Australian gynecologists), it is based on the observation that the normally cloudy cervical mucus blocking the sperm becomes clear, slippery, wet and more profuse during ovulation. In this condition the mucus can more easily be penetrated by sperm cells, and, taking a sample between two fingers, it can be stretched into a long thread. Doctors call this phenomenon
"Spinnbarkeit" (German for “spinnability”). This test plus careful record keeping and self-observation can therefore tell a woman when ovulation has occurred. The accumulated information can, over time, be used to predict the fertile, "unsafe" days on which coitus is to be avoided. This method cannot really be helpful without extensive instruction and professional supervision. Even so, it remains of limited value and is therefore often combined with the "basal temperature method." All three versions of the rhythm method have their drawbacks, however, no matter how they are used in combination.
Effectiveness: not very effective |
