I'm 30w2d, and haven't noticed any stretch marks at all. My weight gain has been pretty slow overall, and has picked up slightly the last few weeks. In total I think I've gained 15 lbs.

I haven't been applying moisturizer with any regularity, and even though I've been saying for months that I should buy some oils or creams specifically to prevent stretch marks, it's something that I haven't gotten around to doing yet.

At this point, should I be worried? I've heard that they are somewhat hereditary. My mom has tons from her two pregnancies. If you have them with current or previous pregnancies, when did they start?