Recent discussions have emerged regarding the methodologies used in traditional Chinese gender calculators for fetal sex prediction. Specifically, these calculators often incorporate variables such as maternal age, lunar cycles, and conception dates. I am interested in engaging with colleagues to critically assess the scientific basis for such calculations.
What is the current evidence regarding the predictive validity of the Chinese gender calculator when compared with established prenatal diagnostic modalities such as ultrasound examination and non-invasive prenatal testing (NIPT)? Are there any methodological studies assessing potential confounding factors (e.g., cultural biases, placebo effects) that might account for success rates reported anecdotally? Furthermore, what mechanisms have been proposed to explain any observed correlations between these calendrical calculations and actual fetal sex determination?
A comprehensive evaluation of these questions could help clarify the role of traditional methodologies in modern clinical practice and their implications for patient counseling.