No, but I did when I found out with my last (now 7) not with my first two. I think they recommend it now if you are trying for a baby. I did however 16 years ago (vain & first child) read that Zinc helped prevent stretch marks so I took this all the way through my pregnancy. I got stretch marks anyway! but, and I'm not sure it's related, but compared to me, her Dad, and her siblings, she has the most perfect teeth and the dentist says if everyone had her teeth, he'd be out of a job. No research has told me this, but she has had the same diet as the others, and obviously our genes, so I tend to think I wonder if that was the Zinc supplement?