Ans.
A family medical history shows record and data of health information about an individual and her/his close relatives. A complete family medical history record comprises information from three generations of family members, including grandparents, parents, uncles and aunts, children, nephews and nieces, siblings, and cousins.
By studying it, one can know the chances for developing same genetic diseases present in his family or he can reduce the risk of developing those health problems by taking precautions.
Thus, 'by knowing family medical history, Mike and Veronica can know if there is any case of genetic disorder in their family, and chances to inherit those disorders(if present in family) by their baby or their doctors can reduce the chance of developing those diseases in their baby by medications or other means.'