Ericsson method

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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, one study[1] suggested that, with parents seeking girls, a 71% success rate can be obtained.

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.[citation needed]

This method differs from the Shettles method, which does not utilize artificial insemination.


  1. ^ Silverman, A.; Ericsson, S.; Osborne, J.; Zack, R.; Drouin, M.; Stephens, S. (1 May 2002). "Female sex selection using clomiphene citrate and albumin separation of human sperm". Hum Reprod. 17 (5): 1254–1256. doi:10.1093/humrep/17.5.1254.