Peer reviewed journal
Aim: Assessing the accuracy of the Chinese lunar calendar for baby gender prediction.
Material and Methods: The research involved singleton pregnancies who gave birth between 1.1.2017 and 1.1.2023. Cases of ambiguous genitalia at birth, multiple pregnancies, unrecorded last menstrual period dates, and IVF patients were excluded from the investigation.
Results: The kappa statistic was used for the statistical analysis, yielding a kappa value of 0.002 and a p-value of 0.797. No agreement was observed between the actual gender and the predicted gender based on the Chinese lunar calendar.
Conclusion: The Chinese lunar calendar, which estimates an infant's gender using the mother's age and conception month, is not a reliable method for determining sex.