Ericsson method
The Ericsson Method is a child conception idea that is reputed to help determine a baby's sex, developed and patented by Dr. Ronald Ericsson. The method has been in use since the mid-1970s. Dr. Ericsson maintains that the method is up to 85 percent effective, but some experts question the effectiveness of the method.[citation needed]
Experiments with the Ericsson method have determined that the method does not create X- or Y-enriched sperm samples. Nevertheless, some studies have suggested that, at least with parents seeking girls, a 71 percent success rate can be obtained.[citation needed]
The Ericsson method is based on the belief that X-sperm swim slower than Y-sperm. Sperm are placed in an atop a "column" of increasingly thicker layers of albumin, and allowed to swim down into the solution. After a certain time period has elapsed, the sperm can be separated into the faster and slower swimmers. If the couple desires a male baby the faster swimmers are artificially inseminated, and if the couple desires a female baby the same procedure is enacted with the slower swimmers.[citation needed]
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