Method
The Ericsson method is based on the belief that X-sperm swim slower than Y-sperm. Sperm are placed 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. This method differs from the Shettles method, which does not utilizeHistory
It was developed and patented by Dr. Ronald Ericsson. The method has been in use since the mid-1970s.References
Further reading
The below references were taken from 123 published papers. These references represent the initial scientific research, the concepts behind altering the sex ratio, the clinical results and the social and demographic history of people who elect to use this technology for a wanted sex selected child. * * * * * * * * * * * Ericsson RJ and Ericsson SA. 1999 Sex Ratios. In: Knobil E, Neill JD (Eds.). Encyclopedia of Reproduction. Academic Press, CA. Volume 4, pages 431–437. * Human reproduction {{human-repro-stub