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Use of IVF Procedure for Male Infertility Doubled

By The JAMA Network Journals - 2015-01-20 - Updated: 2015-01-21

Summary

Use of ICSI doubled between 1996 and 2012, although compared with conventional in vitro fertilization (IVF), was not associated with improved reproductive outcomes.

"The researchers used data on fresh IVF and ICSI cycles reported to the U.S. National Assisted Reproductive Technology Surveillance System during 1996-2012"

Main Document

The use of an assisted reproduction technique known as intracytoplasmic sperm injection (ICSI) doubled between 1996 and 2012, although compared with conventional in vitro fertilization (IVF), use of ICSI was not associated with improved reproductive outcomes, according to a study in the January 20 issue of JAMA.

Intracytoplasmic sperm injection is an IVF procedure in which a single sperm is injected directly into an egg.

The introduction of ICSI in 1992 revolutionized the treatment of couples with male factor infertility (infertility due to abnormal semen characteristics, abnormal sperm function, or surgical sterilization), and made paternity possible for a large proportion of men with no measurable sperm count. In contrast to conventional IVF, ICSI bypasses natural barriers to fertilization, thereby increasing the possibility of the transmission of genetic defects compared to conventional IVF. In addition, the procedure is also considerably more expensive than conventional IVF and adds to financial burdens already experienced by many couples undergoing fertility treatment, according to background information in the article.

Sheree L. Boulet, Dr.P.H., M.P.H., of the Centers for Disease Control and Prevention, Atlanta, and colleagues assessed national trends and reproductive outcomes of fresh IVF cycles (embryos transferred without being frozen) associated with the use of ICSI compared with conventional IVF.

The researchers used data on fresh IVF and ICSI cycles reported to the U.S. National Assisted Reproductive Technology Surveillance System during 1996-2012.

In the absence of male factor infertility, ICSI use was associated with small but statistically significant decreases in implantation, pregnancy, live birth, multiple live birth, and low birth weight rates compared with conventional IVF.

"Although such differences may be a function of the large sample size and thus not clinically relevant, our findings suggest that use of ICSI may improve fertilization rates but not implantation or pregnancy rates in the setting of unexplained infertility, advanced maternal age, and low oocyte [a cell from which an egg develops] yield," the authors write.

This study was supported by the National Center for Advancing Translational Sciences of the National Institutes of Health. All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.

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