PCBs have an affinity for fats, and are therefore not readily eliminated from the body. Women who were poisoned gave birth to babies with slow development, low body weight and congenital abnormalities.
此外，多氯聯苯是親油性化學物質，不易由體內排出，因此造成中毒婦女懷孕生下發育遲緩、體重過輕與畸形的「油症兒」。