My only opinion on this show is that I do not agree with in vitro fertilization that ends up in multiples that a normal family cannot possibly take care of, and I believe the Gosselins fall into this category. Taking care of a couple children, let alone 8, is incredibly expensive and if it weren't for the exploitation of theses kids' lives, no way would they have been able to afford the things they have like a big house, vacations, nannies, visits to the tanning salon, etc.
Making your life into a reality show is a recipe for disaster, it has been shown time and time again that nothing good ever comes out of it.
This was NOT her case. She had IUI - Intra-uterus-insemination; basically a catheter inserts sperm directly through the uterus, making insemination easier to occur.
There is no way to control or predict how many kids you will get pregnant with, but sextuplets are HIGHLY unlikely.
She did not plan to have 6 kids - they wanted 1 kid...