TY  - RPRT
TI  - How accurate is second trimester fetal dating?
AU  - F P Hadlock
AU  - R B Harrist
AU  - J Martinez-Poyer
PY  - 1991
DO  - 10.7863/jum.1991.10.10.557
UR  - https://pubmed.ncbi.nlm.nih.gov/1942221/
ID  - 1942221
ER  -