Hasse’s formula used in pregnancy to?
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
Identify sex age
Identify fetal blood group
Estimate fetal age
Identify fetal congenital malformations