Many different study designs are used in epidemiological research. state which study design is being used in each of the scenarios described below. your choices are as follows:

*experimental study

*retrospective cohort study

*prospective cohort study

*case-control study

*cross-sectional study

*ecological study

a. a hospital-based study of antidepressant medication use during pregnancy and the risk of cleft lip in the offspring. investigators are currently enrolling two groups of women: those who just delivered an infant with a cleft lip and a sample of women who just delivered an infant without any birth defects. the presence or absence of birth defects is based on the newborn physical exam. all mothers are being interviewed to determine their use of antidepressant medications during the pregnancy that just ended.