33K views · 291 reactions |  Clinical Tip: CRL-based dating from a first-trimester ultrasound is more accurate than LMP, especially if: • LMP is uncertain • There’s a >5–7 day difference between LMP and ultrasound In practice, EDD by CRL often replaces LMP-based EDD when there’s a discrepancy. Once set, the EDD shouldn’t be changed #pregnancy #ultrasoundlife #ultrasound #obgyn #pregnancy #obgyndoctor #duedate | Yen Dayres | Facebook