I went through exactly this with both of my pregnancies. After my first baby, about half of the spider veins that appeared faded away within six months, but the rest stayed. After my second pregnancy, even more appeared and very few went away on their own. Once I was done having kids and finished breastfeeding, I waited about a year to make sure my hormones had fully stabilized, then I decided to get treatment. I chose laser removal of the spider veins and it made such a difference in how I felt about my body after having kids. The procedure was quick, and recovery was easy enough to manage even with two young children at home. My suggestion would be to give your body time to heal and adjust after delivery before making any decisions about treatment. You might be pleasantly surprised by how many fade naturally. But if they don't, and they bother you, know that there are effective treatment options available when you're ready. Take care of yourself during this pregnancy first, everything else can wait.