TY  - RPRT
TI  - Grading a developmental continuum--now and then.
AU  - Paul G McDonough
PY  - 2004
DO  - 10.1016/j.fertnstert.2004.07.941
UR  - https://pubmed.ncbi.nlm.nih.gov/15589894/
ID  - 15589894
ER  -