Hasse’s formula used in pregnancy to?: (A) Identify sex age, (B) Identify fetal blood group, (C) Estimate fetal age, (D) Identify fetal congenital malformations
Answer is C. Hasse’s formula If the crown-heel length is known then the intrauterine age of the fetus is calculated as:
If CH length is up to 25 cm then IU age = Square root of CH length If the CH length is > 25 cm then IU age = 1/5 of CH length