Not just safe, it's a jolly good idea. Herring are cold water fish, so they are high in fish oils, one of which is omega-3. Also plenty of bio-available calcium and protein, and low in mercury.
And...
In general, yes. The FDA has issued some warnings about consuming too much fish containing too much mercury. But shellfish isn't one of the highest risks in that category. You should also keep an eye...
Eggs During Pregnancy.
Eggs are a great low-cost source of high quality protein, which your body needs. Body tissue, including muscle and vital organs, is created from protein. At one time, we were...