Hormonal-Cycle Restrictions Narrowed the Oral-THC Study’s Female Sample
The oral-THC study included women using hormonal contraception or tested in the early follicular phase. Its sex comparison did not test responses across every menstrual-cycle phase.
The restriction served an experimental purpose
The authors describe limiting variation in ovarian steroids by including women under those conditions. This can reduce one source of variability in a small controlled experiment. It also makes the tested sample more specific than a general sample of all women using cannabis at unrestricted times.
Control is not a test of hormonal causation
The study reported a selected sex difference in subjective high after 10 milligrams of oral THC. It did not randomize menstrual phases, manipulate ovarian hormones or establish which hormone caused that finding. A restriction intended to stabilize a factor cannot be presented as a direct experiment proving the factor’s mechanism.
The finding needs its population boundary
The data do not define how the same participants would respond during another phase or whether hormonal contraception changes the response relative to no contraception. Other measured endpoints did not show matching sex interactions, reinforcing the need to retain the actual outcome. For a scientific opinion, the relevant description is a selected healthy population under specified hormonal conditions. It does not justify a universal female THC-sensitivity rule or an individual impairment prediction based on cycle phase.
Related analysis: the trial’s main results and limitations.
