One of the final considerations is whether to use a condom or a commercially available ultrasound probe cover. While there have been very few studies that directly compare the effectiveness of covers vs. condoms, it is important to note that the Acceptable Quality Limits (AQL) for the manufacture of latex condoms is equivalent to that of commercially available latex covers, and the AQL for condoms not made with natural rubber latex is essentially equivalent to that of commercially available probe covers that are not made of natural rubber latex.