17381
Here , we report four women with POI who achieved pregnancies resulting from timed intercourse or intrauterine insemination in combination with cyclic estrogen / progesterone therapy and close monitoring of follicle development .
 Chemical: estrogen; Chemical: progesterone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: estrogen; Chemical: progesterone