GENERIC NAME: Progesterone. BRAND NAME: Prometrium. DRUG CLASS AND MECHANISM: Progesterone is a man-made medication derived from a plant source and is identical to the female hormone, progesterone produced in the ovaries.
Confidence votes 11.0K. The average IQ for an American adult is 98, and reaches spot 18 in countries with the highest IQ average. However, there are several spots in which there are duplicate averages, and the US has the 9th highest IQ average (106 being the highest). Desiree Davidson.
The test used was the Wechsler-Bellevue (in German). The average IQ is 128, just short of two standard deviations above the mean of 100. None of these men had below average intelligence. I find it difficult to believe that these IQs were overestimated.