estriol ( e3 ) and estetrol ( e4 ) levels at 36-40 weeks of pregnancy , especially that of total e3 ( t-e3 and unconjugated e4 ( u-e4 ) rose significantly ( p less than 0.01 ) , and were at a ratio of t-e3/u-e3 8 ;
C0014927
estriol
C0014899
estetrol