TY  - RPRT
TI  - Cervical ripening and labor induction: progress and challenges.
AU  - W F O'Brien
PY  - 1995
DO  - 10.1097/00003081-199506000-00004
UR  - https://pubmed.ncbi.nlm.nih.gov/7554589/
ID  - 7554589
ER  -