Notice that in a pericentric inversion one break is in the short arm and one in the long arm. When a parent has an inversion there is an increased risk for offspring with an incorrect amount of genetic material. The possible pregnancy outcomes for an individual with an inversion is rather complicated and depends on how big the inversion is, where it is, and what type of inversion is present, paracentric or pericentric. There are many inversions that occur in the general population that are called normal varients. This has been a simplified description of chromosomes and their abnormalities.
Chromosome analysis is full of exceptions and results that can be difficult to interpret.
The information above is for educational purposes only. If you have a question about a specific chromosome abnormality please contact your physician or a genetic professional. Centura Health Penrose-St.