1493
Masculinization of a female fetus occurred in 5 of 39 ( 12.8 % ) exposed to norethisterone ; all were cases of clitoral hypertrophy not requiring surgical treatment .
 adverse effect: clitoral hypertrophy, norethisterone; adverse effect: Masculinization of a female fetus, norethisterone
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  clitoral hypertrophy, norethisterone; Masculinization of a female fetus, norethisterone 
Answer:
 adverse effect: clitoral hypertrophy, norethisterone; adverse effect: Masculinization of a female fetus, norethisterone