OBJECTIVE: To examine information on preimplantation genetic diagnosis (PGD) 
presented on IVF clinic websites.
DESIGN: We systematically sampled every third IVF clinic on the 2004 Centers for 
Disease Control provider list.
SETTING: The Internet.
PATIENT(S): None.
INTERVENTION(S): None.
MAIN OUTCOME MEASURE(S): Benefits, risks, and other types of information 
mentioned regarding PGD.
RESULT(S): Of 135 sites examined, 88.1% had websites, and 70% mentioned PGD, of 
which 27% were university- or hospital-based and 63% were private clinics. Sites 
mentioning PGD listed uses and benefits of PGD far more than the risks involved. 
Of these sites, 76% described testing for single-gene diseases, but fewer 
mentioned risks of missing target diagnoses (35%) or risks for loss of embryo 
(18%), and 14% described PGD as new or controversial. Private clinics were more 
likely than other programs to be on either the East or West Coast, list certain 
PGD risks (e.g., diagnostic error), note that PGD was new or controversial, 
reference source of PGD information, provide accuracy rates of genetic testing 
of embryos, and offer gender selection for social reasons.
CONCLUSION(S): Most IVF clinics advertise PGD online, but the scope and quality 
of information about it varies widely, emphasizing benefits while minimizing 
risks. Clinics and patients may benefit from more thorough and consistent 
presentation of PGD, drawing on available evidence to best provide a realistic 
portrayal of PGD.