Objectives Infant underrepresentation poses a great risk to accurate palaeodemographic findings when analyzing skeletal samples. Empirically derived palaeodemographic methods all require unbiased or minimally biased pre‐adult representation for estimating demographic characteristics, including fertility. Currently, there are no reliable methods for estimating palaeodemographic parameters when pre‐adults are underrepresented in skeletal samples, consequently such samples are often excluded from palaeodemographic analyses. The aim of this article is to develop a method for estimating total fertility rate (TFR) using reproductive aged adults, specifically for samples with suspected pre‐adult under‐enumeration. Methodology United Nations mortality data and TFR from the World Population Prospects was utilized. The correlation between known fertility and the proportion of individuals in key reproductive years (15–49 years) to total adult sample (15+ years) was assessed as an indirect means to estimate fertility. Results It was determined that the proportion of reproductive aged adults is a reasonable proxy for fertility. A significant positive correlation was observed between the TFR and those who died aged 15–49 years of age as a proportion of those who died ≥15 years (D15‐49/D15+). SE of the estimate revealed reasonable predictive accuracy. When applied to two modern non‐agricultural populations, the method showed some variability in accuracy but good potential for an improved outcome over existing methods when pre‐adults are underrepresented. Conclusion This research has provided a new method for estimating fertility in archeological skeletal samples with pre‐adult under‐enumeration. In combination with a contextually focused approach, this provides a significant step toward further use of biased samples in palaeodemography.
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