PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12042261-2 2002 Our aim was to investigate the frequency of ovulation and pattern of luteal phase progesterone secretion in a group of women with PCO who reported regular cycles and in whom ovulation had been established on the basis of previous investigations. Progesterone 82-94 PCOS1 Homo sapiens 130-133 12042261-10 2002 CONCLUSION: Women with PCO did not have more variation in cycle length than fertile women with normal ovaries, but there were significantly lower levels of progesterone in the early luteal phase. Progesterone 156-168 PCOS1 Homo sapiens 23-26