Hello, I have gone through your query and here is your answer. You should not experience any stress during the early weeks of pregnancy while the establishment of the pregnancy in the uterus happens. This means you cannot travel much, leave alone jerky rides. Sexual intercourse, lifting heavy weights also should be avoided during the early and the late trimesters. Do enjoy watching the rides, but please do not ride. As the movement is continuously on during a ride, there is intense pressure on the pelvic region and in turn on the uterus and this may cause hemorrhages and disturbance of the burrowing gestation sac. Hope your query has been clarified. Take care.