Ginseng is a beneficial herb and very effective for improving memory, preventing degenerative brain ailments like Alzheimer's. Its neuroprotective effect even prevents depression. Few studies show that ginseng can also give a small boost to learning as well as concentration. No conclusive results are stated so its safety is still questionable during pregnancy. During the first trimester, it is best for the mother and the baby to avoid ginseng and other medications that haven't been prescribed by their doctor.