Preventing stretch marks/loose skin!

This is my first pregnancy I’m wondering what’s the best creams/oil/butters for preventing stretch marks and loose skin after pregnancy. I plan on working out throughout the rest of my pregnancy to prevent the extra weight gain besides baby, but I’m terrified for that loose skin. It sounds selfish but I can’t be the only one.... I know it’s mainly genetics on who gets stretch marks, my mom barely had one with four big baby’s so hopefully same for me but I want to take extra precaution !!!