ow is the teaching of “Humanae Vitae’ being lived out? Host J.A. Gray and guests Mariana Lopez and Carlos de la Torre follow up on natural family planning and discoveries in human biology that in the past 50 years have been refined and developed into a systematic treatment that is 97 to 99 percent effective. There are no drugs, no chemicals, no instruments or tools. This science-based regimen is frequently associated with Catholicism--and yet, most Catholics know little about it which explains why this particular application of medical science is approved by the Catholic Church. Sunday, 5:30 a.m., KPIX Channel 5. Prior episodes of Mosaic are archived on the archdiocesan website at sfarch.org/mosaic-tv.