4516
Family planning continues to play a minor role , and only 25 . 3 per cent of all patients reviewed took to oral contraceptives for shorter or longer periods of time . - The percentages of primiparae and secundiparae in all births as well as the high percentage of multigravidity are parameters by which the approach to reproduction differs substantively from behaviour patterns in Europe .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
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