Which term best defines the follWhich is the gestational age that fetal death certificates are most likely required? Question 41 options: a) Both a and b are correct b) 17 to 21 weeks or more c) Neither a nor b are correct d) Less than 15 weeksowing formula? Total number of new cases of a specified disease during a given time period divided by the total population at risk during the same time period 1,000 Question 40 options: a) Both a and b b) Prevalence rate c) Neither a nor b d) Incidence rate