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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 combinationG03FB - Progestogens and estrogens, sequential preparationsG03FB01 - Norgestrel and estrogen
 
 Norgestrel and estrogen
 
 
 
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