7178
Although diagnostic laparoscopy is still considered the standard reference in the diagnosis of ectopic pregnancy ( EP ) , use of high - resolution endovaginal sonography , in conjunction with qualitative serum assays of the beta subunit of human chorionic gonadotropin ( beta - hCG ) , allows detection of earlier and smaller EPs .
 human chorionic gonadotropin, beta - hCG
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 human chorionic gonadotropin, beta - hCG