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“Estimation of Age: Neonatal Line (NL) Analysis
In the Carthaginian sample, NL thickness ranged from 6.3 to 14.5 µm, with a mean of 10.1 µm (±2.76 µm). Comparative estimates obtained by the same investigative methods on deciduous teeth of all morphological classes were available from 124 crowns representing 102 modern European children [43], [60] and from 209 crowns representing 109 children (aged 6 months to 9 years) buried at the Imperial Roman cemetery of Isola Sacra [31], [60]. In the modern sample, NL thickness ranged from 6.5 to 50.9 µm and the mean value corresponded to 17.3 µm (±7.97 µm). In the archaeological sample, the range of variation range 9–36 µm with a mean of 16.7 µm (±4.40 µm). Additional values from a modern sample of 147 children ranged from 10 to 24 µm [27].
An NL results from perturbation in matrix deposition of enamel prisms reflecting stress in the transition from an intra- to extra-uterine environment (Figure 2), which does not always correspond to parturition following a full-term pregnancy [61]. Given the periodicity of enamel deposition, a newborn must survive at least 7 and even as many as 10 to 15 extra-uterine days in order for an NL to emerge fully. A definitive NL was observed in 24 Carthaginian specimens (Table 2); the amount of subsequent enamel deposition suggests these individuals survived at least 2 weeks postpartum. An NL was absent in 26 Carthaginian specimens (Table 2), which suggests that these individuals were either stillborn, spontaneously aborted, or died during the first extra-uterine week. Unambiguous counts and measurements of daily enamel cross-striations, which provide information on the timing and rate of enamel deposition and thus indirect evidence of gestation length [31], [33], could not be obtained on this sample. However, because other analyses in our study indicate the presence of individuals who had not reached full term, we suggest that individuals lacking an NL probably fall into the prenatal category because comparison of morphological/metric and NL age estimates demonstrates that when they differed, the histological (NL) age more frequently over-aged individuals than did morphological age (M<H 22%, M>H 10%; see Table 3). Consequently, if we include with the prenates those individuals who did not survive beyond one or even two weeks postpartum, we must conclude that a significant number of individuals could not have been sacrificed because they were either not alive or not yet old enough to be considered viable sacrificial entities [7], [8], [10], [13] (Figure 5).”
>> “a significant number of individuals could not have been sacrificed because they were either not alive or not yet old enough to be considered viable sacrificial entities.”
“Discussion
The identification of prenatal individuals in the Carthaginian Tophet sample is consistent with current data from modern-day studies on the incidence of stillbirth and spontaneous abortion as being the primary contributors to “reproductive wastage” [62], as well as with recent data on infant mortality [48], [49]. For example, in England and Wales from 1969 to 1976, 48.4% of 6517 deaths within two weeks of live birth occurred between 30 minutes and 24 hours and 39.3% between 7 and 13 days [61]. These statistics easily accommodate our results.”
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