I would also like to know this. is nuptial sexing when you sex them by the black dot on their front feet? Also i have one that may help you, You can sex them by the cloaca the females will have a little flap hanging off the back between their legs, the males wont.
Adult female chloris carry eggs almost constantly, they can be seen through their skin as a mottled area in front of the rar legs, they are also a bit chubbier than males and after seeing hundreds of them you can usually tell by just looking at them