▁Independent ▁List s ▁party . ▁Pet rov ▁res igned ▁his ▁position ▁as ▁Spe aker ▁on ▁ 4 ▁May ▁ 2 0 1 7 , ▁amid st ▁a ▁government ▁and ▁parliament ary ▁crisis . ▁Having ▁held ▁the ▁office ▁for ▁a ▁little ▁over ▁six ▁months ▁Pet rov ▁is ▁to ▁date ▁the ▁short est ▁serving ▁Spe aker ▁of ▁Parliament ▁since ▁ 1 9 9 1 . ▁ ▁Early ▁life ▁and ▁family ▁Pet rov ▁was ▁born ▁in ▁Met k ović ▁on ▁October ▁ 1 6 , ▁ 1 9 7 9 ▁to ▁lock sm ith ▁Jak ov ▁Pet rov ▁and ▁Mar ija ▁Pet rov , ▁a ▁book keeper . ▁He ▁has ▁an ▁elder ▁sister , ▁Nikol ina , ▁and ▁two ▁younger ▁brothers , ▁Bran imir ▁and ▁Ivan . ▁Pet rov ▁attended ▁elementary ▁school ▁in ▁his ▁h omet own ▁and ▁high ▁school ▁( class ical ▁( Christ ian ) ▁g ymnasium ) ▁in ▁Sin j . ▁At ▁age ▁ 1 4 ▁he ▁decided ▁to ▁join ▁the ▁Francis can ▁order , ▁but ▁eventually ▁changed ▁his ▁mind . ▁ ▁Pet rov ▁graduated ▁from ▁the ▁Medical ▁Fac ulty ▁of ▁the ▁University ▁of ▁Most ar ▁in ▁Bos nia ▁and ▁Herz egov ina , ▁and ▁special ized ▁psych iat ry ▁in ▁the ▁Psych iat ric ▁Hospital ▁V rap če ▁in ▁Zag reb , ▁after ▁which ▁he ▁worked ▁as ▁a ▁psych iat rist ▁at ▁the ▁University ▁C lin ical ▁Hospital ▁in ▁Most ar . ▁He ▁is ▁married ▁to ▁Ma š a ▁Pet rov , ▁a ▁primary ▁school ▁teacher ▁with ▁whom ▁he ▁has ▁three ▁children