Tra từ ovulation method - Từ điển WordNet v3.1

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Từ điển WordNet v3.1 - WordNet Dictionary

ovulation method

noun

natural family planning in which the fertile period is inferred from changes in the character and quantity of cervical mucus;
ovulation is marked by an increase in mucus that becomes sticky and then clearer and slippery
• Syn:
ovulation method of family planning
• Hypernyms:
natural family planning