TY  - RPRT
TI  - Nitric oxide--another factor in cervical ripening.
AU  - A A Calder
PY  - 1998
DO  - 10.1093/humrep/13.2.250
UR  - https://pubmed.ncbi.nlm.nih.gov/9557814/
ID  - 9557814
ER  -