This study examines the incidence of embryonic haemoglobins in three lizards; two of them viviparous, Hemiergis peronii and Tiliqua rugosa, and one oviparous, Pogona vitticeps. Haemoglobin peaks, detected by High Performance Liquid Chromatography, were regarded as different haemoglobin types if a difference in peak retention time was significant. In all three species there was a significant probability more than one haemoglobin type was present (P_Hemiergis=0.0005; P_Tiliqua<0.0001; P_Pogona<0.0001; a level=0.05). However, only T. rugosa and P. vitticeps were found to exhibit possible embryonic haemoglobins. In H. peronii and T. rugosa placental structure was examined. The simplistic apposition of the cell layers in H. peronii suggest the placental structure is either of Type I or II, and more suited to lecithotrophy. The increased complexity of T. rugosa's placental structure suggests it is either Type II or III, and favouring the passage of nutrients across the placenta. With increased cell later complexity, gas exchange difficulty also increases. Correlation between the incidence of embryonic haemoglobins and the complexity of the placental structures may be possible. This may be supported by the incidence of embryonic haemoglobins in the oviparous lizard species.