TY  - RPRT
TI  - Recurrent low second-trimester hCG.
AU  - R G Best
AU  - J G Edwards
PY  - 1993
DO  - 10.1002/pd.1970131216
UR  - https://pubmed.ncbi.nlm.nih.gov/7513890/
ID  - 7513890
ER  -