But other research has implicated increasing maternal and paternal age, low birth weight, multiple pregnancies and any medications or infections to which an expectant mom is exposed during pregnancy.
但其它的研究表明，父母生育年纪较大，出生体重较低，多胎妊娠以及准妈妈在怀孕期间的任何药物治疗或者感染等，这些都与自闭症的形成有关。
Lowmaternal exposure to ultraviolet radiation in pregnancy, month of birth, and risk of multiple sclerosis in offspring: longitudinal analysis.
母亲孕期暴露于小剂量紫外线辐射、分娩月份和后代多发性硬化的风险：纵向研究。
Lowmaternal exposure to ultraviolet radiation in pregnancy, month of birth, and risk of multiple sclerosis in offspring: longitudinal analysis.
母亲孕期暴露于小剂量紫外线辐射、分娩月份和后代多发性硬化的风险：纵向研究。
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