Czech 'supermum' gives birth to country's first quintuplets The babies, who were conceived naturally, have been placed in intensive care but are said to be in stable condition. Their weight ranged from 1.05 to 1.34 kilogrammes (2.5 to 2.15 pounds). In our country (birth) statistics have been recorded since 1949 and there's no mention of quintuplets. In the Czech Republic quintuplets are born on average once every 480 years," obstetrician Alena Mechurova said.