249
We measured basal plasma prolactin concentrations ( in samples obtained during the early follicular phase ) in 25 normal ( control ) women and in a similar group of 40 patients with a long - standing history of infertility .
 prolactin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 prolactin