MMR and the link to autism has been debunked over hundreds of peer-reviewed articles. There is no evidence, at all, that a link exists. Regarding other issues with pregnancy, I'm not able to determine what articles you're referencing. Keep in mind that stories aren't evidence, and correlation does not equal causation No matter how many stories you read, the plural of "anecdote" is not "evidence." If your doctor feels that 3 months is sufficient, you should probably believe his advice. You may also want to seek a second opinion if you're not comfortable with the first doc's opinion.