According to a new report, Kate Middleton is pregnant with her and Prince William 's third child just four months after welcoming their daughter. Kate Middleton with Princess Charlotte in May.(Photo Credit: Getty Images).ccording to a new report, Kate Middleton is pregnant with her and Prince William 's third child just four months after welcoming their daughter. Kate Middleton with Princess Charlotte in May. (Photo Credit: Getty Images).
For other uses, see etiology. Etiology (/iËtiËÉlÉdÊi/ ; alternatively aetiology) is the study of causation, or origination. The word is derived from the Greek Î±á¼°ÏÎ¹Î¿Î»Î¿Î³Î¯Î±, aitiologia, giving a reason for (Î±á¼°ÏÎ¯Î±, aitia, cause; and -Î»Î¿Î³Î¯Î±, -logia).
, Immunologist, Ph.D. Etiology is the (usually unknown) set of causes of the disease. It's important to keep in mind that etiology is not only disease-specific, it's also person-specific, in that a set of factors can cause Disease X in one person but not another (given their genetics, how they grew up, their fitness level, their co-exposures, etc.).