www.azarh.com br Dr. Mark Johnson explains that the majority of human conceptions are lost in early life because of chromosomal problems with the embryo. At Arizona Associates for Reproductive Health, we provide preimplantation genetic screening to test for aneuploidy and other chromosomal abnormalities. These early-stage screening tests allow us to better understand causes of infertility. br To learn more about Arizona Associates for Reproductive Health, please visit www.azarh.