Table 1

Conditional sex ratios at birth (females per 1000 males), by birth order, 1992–2010

Birth orderAllFirst-bornSecond-born
Sex of previous childrenNANAFirst-born maleFirst-born female
YearMean95% CInMean95% CInMean95% CInMean95% CIn
1992–1994975(945 to 1007)14963964(892 to 1041)36421063(949 to 1191)1580951(852 to 1061)1685
1995–1997952(920 to 985)13050878(807 to 954)3295856(760 to 963)1474967(858 to 1090)1439
1998–2000973(938 to 1009)11553920(850 to 995)3136902(799 to 1018)13861021(906 to 1150)1340
2001–2003928(887 to 971)7586907(812 to 1011)2187818(688 to 969)966947(810 to 1106)968
2004–2006962(915 to 1012)6044975(872 to 1090)1864971(816 to 1157)812830(702 to 978)788
2007–2010933(880 to 989)45211010(907 to 1124)1489822(689 to 979)633742(599 to 913)614
Birth orderThird-bornFourth or above
Sex of previous childrenBoth maleBoth femaleOne male, one femaleNA
YearMean95% CInMean95% CInMean95% CInMean95% CIn
1992–1994811(681 to 964)6621027(864 to 1221)719984(870 to 1113)1327963(912 to 1016)5348
1995–1997922(763 to 1112)530975(814 to 1167)6401131(995 to 1287)1163951(897 to 1008)4509
1998–20001005(806 to 1254)449849(699 to 1027)553954(827 to 1099)9481011(948 to 1078)3741
2001–2003933(713 to 1218)300872(689 to 1099)392888(726 to 1084)620972(893 to 1057)2153
2004–2006930(650 to 1325)198846(629 to 1130)3131041(845 to 1282)490994(900 to 1097)1579
2007–2010892(637 to 1241)169767(556 to 1046)215935(707 to 1233)3721100(973 to 1244)1029