For generations, the shadow of valproate has fallen most heavily on women of childbearing age, but a quieter question has lingered: what of the fathers? A sweeping Taiwanese study spanning 2.5 million births and fifteen years now offers a measured answer — that a father's use of this common antiseizure drug before conception does not appear to raise the risk of autism, ADHD, or birth defects in his children. The finding does not close the conversation, but it does push back against recent warnings from the United Kingdom, reminding us that medical caution, however well-intentioned, must be con