“…It should be mentioned, however, that some studies have reported higher rejection rates for males (JENSEN et al, 1968;MIT-CHELL, 1968;WHITE & HINDE, 1975;STEVENSON-HINDE & SIMPSON, 1981;§ BERMAN, 1982§ BERMAN, , 1984THOMMEN, 1982;SIMPSON, 1983;JOHNSON & SOUTH-WICK, 1984;FAIRBANKS & MCGUIRE, 1985;ROWELL & CHISM, 1986) while others have found no sex differences (KAPLAN, 1972;YOUNG & BRAMBLETT, 1977;NASH, 1978;ALTMANN, 1980;NICOLSON, 1982;LEE, 1984;COLLINGE, 1987;FAIRBANKS, 1988). So far, no satisfactory explanation has been offered which integrates all these results, but the consideration of maternal rank and infant sex simultaneously may prove helpful.…”