The measures will make life harder for thousands of men aged between 18-27 who do their best to dodge recruitment officers trying to force them into military service.
Ukrainian Deputy Defense Minister Vadym Skibitskyi said that around January 15 conscription would begin and that it would take Russian forces around two months to organize its formations.
The US initiated a call through the "de-confliction" line to communicate its concerns about Russian military operations near critical areas in Ukraine.
Russia is stalled on several fronts and has made no significant territorial gains in more than six weeks, one reason is a lack of personnel, according to military analysts.