This appears to be an unusual design in Liao dynasty pillows. However, the theme suggesting male progeny is a recurring subject matter in Chinese art. For other molded amber and green-glazed pillows of this period, but with different decoration, see the exhibition catalogue, Chinese Ceramics Pillows from Yeung Wing Tak Collection, The Museum of Oriental Ceramics, Osaka, 1984, pp. 211-12, nos. 107-110.