peripheral plasma oestrone and oestradiol concentrations were measured by radioimmunoassay and results indicated that plasma oestrone concentrations in pregnant and non-pregnant mares were not different , and oestradiol was lower ( p less then 0.005 ) in the peripheral plasma during pregnancy . conceptus membranes were incubated in vitro for 120 min in a chemically defined medium .
C0014942
oestrone
C0032961
pregnancy