https://sfari.org/ --Simmons Foundation Autism Research Initiative; summaries of articles from medical and scientific journals; many articles about genetics.
http://library.austintexas.gov/databases/All%20Databases --Chose "Academic Search Complete," put in your library card number, and, when you get to the search page, choose peer-reviewed articles within a certain time frame to narrow your search. Full text articles available from some medical and science research journals, such as Nature.