In our study, the number of women with a low level of education was probably smaller compared to the Dutch population [20]. (bmcpregnancychildbirth.biomedcentral.com)
For women with the lowest levels — about 25 percent of the general population — increased dopamine during ovulation will sharpen cognitive functions, whereas for the 25 percent of women with the highest levels, ovulation seems to take them beyond a threshold and to impair thinking. (scientificamerican.com)