The incidence of discordant fetal sex is estimated to be 1 in 1500-2000, requiring comprehensive evaluation. Chimera is identified as one of the possible causes of genotype-phenotype sex discordance, detectable prenatally through a combination of noninvasive prenatal screening and ultrasound. Genetic counseling for prospective parents on chimera may be complex, necessitating early support and information from experienced professionals.
Bulleted Statements: What's already known about this topic? The incidence of discordant fetal sex was estimated to be 1 in 1500-2000. Comprehensive evaluation is required to investigate the underlying cause. What does this study add? Chimera is one of the possible causes of genotype-phenotype sex discordance. It could be detected prenatally with the combination of noninvasive prenatal screening and ultrasound. Genetic counseling to prospective parents on chimera can be complex where early support and information from experienced professionals are important.
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