12923
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 a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 adverse effect: clitoral hypertrophy, norethisterone; adverse effect: Masculinization of a female fetus, norethisterone