Robertson H A, King G J, Dyck G W
J Reprod Fertil. 1978 Mar;52(2):337-8. doi: 10.1530/jrf.0.0520337.
Detectable concentrations of oestrone sulphate were present in 50% of the plasma samples collected from pregnant animals by Day 17. No oestrone sulphate was detected in plasma from cyclic nonpregnant pigs.
到第17天,从怀孕动物采集的血浆样本中有50%存在可检测浓度的硫酸雌酮。在周期性未怀孕母猪的血浆中未检测到硫酸雌酮。