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Gender Selection the Ericsson Method.Scientists have known for many years that sperm carrying an X chromosome produce females and sperm carrying a Y chromosome produce males. In the early 70's, scientists discovered that sperm samples with high concentrations of either X or Y bearing sperm could be obtained. In 1975, Ronald J. Ericsson, Ph.D. began clinical studies to determine whether enriched sperm samples would result in offspring of a desired gender. The results were very encouraging and today this procedure is widely accepted by the scientific community. Currently, the Ericsson Method is used in approximately 50 centers in the United States and in many centers worldwide. How does it work?Dr. Ericsson devised patented methods by which X and Y sperm can be separated through filtering processes. Sperm are "layered" over a column of human serum albumin and they swim down the gradient where they are collected in the bottom layer. The fraction of sperm that contain the male (Y) bearing sperm are used for insemination if a boy is desired. It is effective 70-75% of the time. The fraction of sperm that contain the female (X) bearing sperm are used for insemination if a girl is desired. It is effective 70-72% of the time. Success RatesWhen couples ask us about success rates they usually want to know what their chances are of delivering a healthy baby of the desired sex. Success rates depend upon many factors including which procedure is chosen, the couple's age, underlying medical conditions, etc. Couples who are "reproductively healthy" have a greater chance of conceiving than those with underlying diseases, such as male factor infertility. Couples choosing the Ericsson Method of gender selection will undergo an intrauterine insemination cycle(s) often using ovulation inducing medications.
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