I think it depends on the relationship you have with your parents, the manner in which you found out about being conceived in vitro, the age you are when this information is shared with you, the reasons why you were conceived that way, and your education on fertility problems and in vitro fertilization. I think that if the parents are loving and have taken the time to carefully inform their child of the way he or she was conceived, then I think the child could be accepting of it without any long lasting effects.
Two prominent thoughts come to mind: 1) I was NOT a mistake and 2) My parents wanted me so badly that they went to extra pain, expense, and trouble just to get me here. How cool is that?
I agree that there could be some negative psychological impact from discovering that you were conceived in vitro. However, it could be a very affirming revelation as well. At least you would know that you were definitely wanted and planned for, so much so that your parent(s) went to a great deal of trouble and expense to create you. Regardless of what started the process of the sperm meeting the egg, conception is still miraculous, and the person conceived in vitro is just as much a wonder as the person conceived in the womb.
This is such an open question, you were probably better off having started a discussion thread. When people are a product of in vitro fertilization, it very well could impact them psychologically. They could go through the thought process of "I am not normal. I couldn't be conceived traditionally. There must be something wrong with me." Or they could flip it the other way and realize that his/her parents wanted a child so bad they went to those lengths to create his/her life. It all depends on the psychological makeup of the person that was conceived and how he/she feels about her/himself.
the psychological impact of knowing that i was conceived in vitro is VERY profound and it is more or less the basis for how i make my conscious decisions on a daily basis. i am a twin because of in vitro ferilization. i was told when i was around 13 years old. i am very confused emotionally about a lot of things. i don't want to get too into it but yes, for me there have been lasting effects.