There are some destinations that should be avoided when pregnant, for example those that are more than 3.000 meters high. This occurs in some areas of Peru, although not in Machu Picchu, which is located at 2.430 meters. You have all the information in: «Traveling pregnant: Is it advisable to go by plane?«.
You have all the information in: "Traveling pregnant: Is it advisable to go by plane?".