Pregnancy and Amusement Parks

"The concern with roller coasters during pregnancy is associated with the rapid starts and stops along with jarring that occurs during the ride. 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."
http://www.americanpregnancy.org/pregnancyhealth/rollerco...

"In the old days, women weren't allowed to do anything when they were pregnant, and now women want to do everything! But there are some activities that do pose a risk to the pregnancy, and roller coasters are on the list. Why? Because rapid starts and stops that create shearing forces inside the uterus can, in theory at least, cause premature separation of the placenta from the wall of the uterus, known by the medical term placental abruption. I don't know of any research that shows that roller coaster riding has actually led to this complication, but I don't know of any research that shows it's safe either. And, since car accidents can cause this serious complication even when there isn't direct trauma to the uterus, there is reason to believe that roller coasters may also be unsafe for babies and mothers-to-be."
http://www.drspock.com/faq/0,1511,7277,00.html

"There is no way to determine how safe is "safe", when talking about roller coasters. It is quite likely that there will be no effects at all on a very early gestation. HOwever, if implantation is not that good or if the placenta has any "subchorionic bleeds" the jerky movements of the roller coaster may cause problems. Certainly, later on in pregnancy can be risky due to changes in your center of gravity and the risk that changes in pressure can cause premature rupture of membranes or preterm labor. I would not recommend roller coasters at all during your entire pregnancy. That also goes for scuba diving (the baby gets "the bends") or skydiving."
http://en.allexperts.com/q/ObGyn-Pregnancy-issues-1007/Ro...

Here is a site that answers your question:

http://www.americanpregnancy.org/pregnancyhealth/rollerco...

As the site says there is no real study done, why risk a baby's health on something that could harm him/her while they grow inside of you.

Hi B.! I know this is not what people want to hear- because I didn't want to hear it either! :) I would NOT go on any rides while pregnant. My reason is this; amusement park rides are one of the leading causes of traumatic brain injury (TBI). I LOVE rollercoasters. The scarier the better! After attending seminars on traumatic brain injury I will never go on one again. If it can be that harmful for our brains, think of what it could do to a baby. Yikes! However, I have heard that waterslides are PERFECTLY safe for pregnant women since there are no jolting movements.

not only might you not fit in the safty straps correctly but it isn't good for the baby to get jerked around, this can cause the embilical cord to get caught around the neck cutting off blood flow. Also if ther is a hard enough impact it can put you into labor.

Overall the rides just aren't worth the risk.