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| United States | Namibia | Poland | Argentina | Total | |
|---|---|---|---|---|---|
| (n = 20) | (n = 6) | (n = 23) | (n = 21) | (N = 70) | |
| Infant Sex | |||||
| Male | 7 | 2 | 12 | 9 | 30 |
| Female | 13 | 4 | 11 | 12 | 40 |
| Infant Age, days M(SD) | 200 (101) | 239 (194) | 195 (100) | 241 (107) | 214 (112) |
| Maternal Parity Status | |||||
| Primiparous | 10 | 0 | 11 | 3 | 24 |
| Multiparous | 10 | 6 | 12 | 18 | 46 |
| Parity M(SD) | 1.7 (0.9) | 5 (3.1) | 2.1 (1.2) | 3.9 (2.6) | 2.8 (2.1) |
