Will amusement park rides hurt chances for a baby?

hi,
We are planning for a baby. But after that we went to SIX FLAGS (RIDES). Is that is wrong ????

Disney, Six Flags, Busch Gardens and even your local state fair all pose warning signs not to ride certain rides during pregnancy.

The concern with roller coasters, thrill rides, and virtual rides during pregnancy is associated with the rapid starts and stops, the jarring forces, and the pressures against the body that occur during these types of rides. This rigorous activity creates additional jarring forces within the uterus that may lead to premature separation of the placenta from the wall of the uterus, which is called placental abruption.

However, if you aren't pregnant yet (and are SURE of this), I don't see how the rides would hurt.