This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification of Living, Subject name: Forensic Medicine
Hasse's formula is used in pregnancy to? 
Select and explain. 
A. Estimate fetal age, B. Identify fetal blood group, C. Identify fetal sex, D. Identify fetal congenital malformations
A: Estimate fetal age
Answer: A: Estimate fetal age 
Explanation: Ans. (a) Estimate fetal ageRef. Textbook of forensic medicine and toxicology by nageshkumar rao, p 321