Previous analysis of the perinatal infant burials from Romano-British Hambleden indicated the practice of infanticide at that site. We attempted to determine whether this practice was specifically targetted at one sex or other by determining the sex of the infants using analysis of fragments of the amelogenin gene. We also analysed mtDNA in order to shed light on aspects of kinship. Thirty-three infants were analysed, and sex was successfully identified in 12. Seven were female, five male. No two infants shared identical mtDNA polymorphisms, indicating that all came from different mothers. Taken together with previous DNA results from perinatal remains from Roman-British sites where infanticide has been identified, they provide no evidence that manipulation of the sex ratio was a motivation for infanticide in Roman Britain. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 2 ABSTRACT Previous analysis of the perinatal infant burials from Romano-British Hambleden indicated the practice of infanticide at that site. We attempted to determine whether this practice was specifically targetted at one sex or other by determining the sex of the infants using analysis of fragments of the amelogenin gene. We also analysed mtDNA in order to shed light on aspects of kinship. Thirty-three infants were analysed, and sex was successfully identified in 12. Seven were female, five male. No two infants shared identical mtDNA polymorphisms, indicating that all came from different mothers. Taken together with previous DNA results from perinatal remains from Roman-British sites where infanticide has been identified, they provide no evidence that manipulation of the sex ratio was a motivation for infanticide in Roman Britain.