I normally have pretty brittle nails even though I have been taking prenatals forever while TTC and I take really really good care of them. They just aren't strong enough to grow very long. During my first trimester though my nails were the longest they had ever been, super strong, and had a nice natural gloss. I didn't even want to do them because they looked naturally gorgeous. Now that I am in my second trimester though they are worse than ever. They are dull, brittle, and flaky. I can't do my nails now because polish or wraps with just flake off with my nails. That is the one symptom that I did not want to go away with this trimester, super bummed.