Discrepancy in menstrual and ultrasound‐based gestational age is associated with chromosomal aberrations and adverse pregnancy outcomes—Results from a nationwide cohort study

Key Points

• This study examines the impact of discrepancies between menstrual and ultrasound-based gestational age on pregnancy outcomes and chromosomal health.
• Analysis of nationwide cohort data
• Comparison of menstrual and ultrasound gestational age
• Correlation with chromosomal aberrations and pregnancy complications
• Smaller than expected crown-rump length (CRL) linked to increased chromosomal aberrations
• Associated with higher rates of adverse pregnancy outcomes
• Suggests better prediction algorithms may reduce risk of complications