TY  - RPRT
TI  - Maternal oestriol levels reflect placental function rather than foetal function.
AU  - L Perry
AU  - R Hickson
AU  - B C Obiekwe
AU  - T Chard
PY  - 1986
DO  - 10.1530/acta.0.1110563
UR  - https://pubmed.ncbi.nlm.nih.gov/2939681/
ID  - 2939681
ER  -