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Level 5
  
G - Genito urinary system and sex hormonesG03 - Sex hormones and modulators of the genital systemG03F - Progestogens and estrogens in combinationG03FA - Progestogens and estrogens, fixed combinationsG03FA07 - Lynestrenol and estrogen
  
Lynestrenol and estrogen
  
 
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