How important is it to keep taking prenatals at 36 1/2 and TTC? I am just having the worst side effects with prenatals. Of course, its not a good idea to stop taking them when trying to conceive, I know this. I definately do not want to stop these vitamins, however, they are causing me to have loose stools every day. Ive tried expensive brands, cheap brands, as many as 9 different kinds. I finally found one that works best for me, but am waking up having to run to the bathroom every morning. If I am having lose stools every day, i am worried that I am losing those vitamins that might prevent birth defects, disabilities, etc.? My OB stressed to me last week how important it is to keep taking them, but prenatal vitamins side effects are the least of her concerns. She did say 1 in 200 women over 35 will have a baby with a disability because of the age. Even a regular multi-vitamin gives me side effects. Any suggestions?