Now on to the paper in question. The study is from a German group, no surprise there. They got healthy volunteers:
"Forty-seven healthy men (average age 25 ± 6.1 years) and 61 healthy women (average age 24 ± 2.4 years) received 0.79–0.95 g of ethanol/kg body weight in the form of an alcohol beverage of their choice."
And then they measured sex hormones and followed blood ethanol kinetics:
"The mean hourly elimination rate (ß60) was 0.1677 ± 0.0311 g/kg/h in men. In women, the mean hourly elimination rate was 0.2044 ± 0.0414 g/kg/h in the high progesterone group and 0.1850 ± 0.0276 g/kg/h in the low progesterone group "
Now I'm not sure how the author went from this data to the conclusion that gender differences in kinetics are partially explained by progesterone, but I wouldn't mind being a study subject... So that I can brag about my high progesterone levels...