Your bad event would still be technically called a miscarriage. The most common of these will be trisomies, monosomies, and triploidies. A trisomy is a triplication of one of the sets of chromosomes in a human being. People have 23 pairs. The 23rd pair is your sex chromosome.
XX is always a female, XY are males.
Most trisomies will end up in a miscarriage although some trisomies, such as trisomy 21, CAN make it to term and live. Trisomy 21 is Down's syndrome. Reasonably, the larger the chromosome abnormality, the more incompatible with life. The lower the chromosome number, the larger the size of the chromosome. That is, chromosome 2 is much larger than chromosome 20.