These are on my sides. I have stretch marks from puberty there, as you can see, plus on my thighs that are faded. This pregnancy is my first and I have bad stretch marks on my butt, and now these. I've been putting bio oil on my belly since I found out I was pregnant. Who would have guessed I needed to put it on my butt, too? Can I prevent these from getting worse? I'm 28 weeks.