sentence: Out of the 97 women , 52 women provided 105 pregnancy outcomes after the Yusho incident.Among the 21 PCB and dioxin-related compounds measured , PeCDF , 3,3 ′ ,4,4 ′ ,5 - pentachlorobiphenyl ( PCB-126 ) , and 3,3 ′ ,4,4 ′ ,5,5 ′ - hexachlorobiphenyl ( PCB-169 ) were selected for the statistical analyses because of their medical importance .