Looking for Hansen Family from Copenhagen Denmark

I am looking for information on my Danish family Carl Frederick Hansen who married Magdaline Lasine Lauritsen at the Frue Kirke, Copenhagen 2nd August 1863. Carl died at sea in 1876 & may have been a marine engineer (stoker?)They had 3 children Alfred Billie, born abt 1868 Marie born abt 1871 died in Denmark abt 1884 & Carl Frederick born 1876 probably all in Copenhagen. My problem is finding records of the births, I got the wedding from the IGI but no births. Any help appreciated.