Mean length-for-age (A) and weight-for-length (B) Z scores from birth to 24 months according to child HIV status and timing of infection. A: N for IU at baseline, 6 weeks, 6, 12, 18 and 24 months is 380, 264, 142, 103, 52 and 34, respectively. N for IP at 6 weeks, 6, 12, 18 and 24 months is 502, 284, 200, 102 and 57, respectively. N for PN at 6, 12, 18 and 24 months is 77, 138, 97 and 80, respectively. N for HEU at baseline, 6 weeks, 6, 12, 18 and 24 months is 3993, 2365, 2181, 1916, 1007 and 714, respectively. N for unexposed at baseline, 6 weeks, 6, 12, 18 and 24 months is 9053, 6233, 6439, 6212, 1733 and 1220, respectively. B: N for IU at baseline, 6 weeks, 6, 12, 18 and 24 months is 342, 262, 142, 103, 52 and 34, respectively. N for IP at 6 weeks, 6, 12, 18 and 24 months is 449, 498, 282, 199, 102 and 56, respectively. N for PN at 6, 12, 18 and 24 months is 77, 138, 96 and 79, respectively. N for HEU at baseline, 6 weeks, 6, 12, 18 and 24 months is 3730, 2346, 2177, 1915, 1006 and 710, respectively. N for unexposed at baseline, 6 weeks, 6, 12, 18 and 24 months is 8598, 6206, 6431, 6202, 1733 and 1216, respectively.