Stretch marks during pregnancy are extremely common, affecting 50% to 90% of pregnant women, and no product or routine can guarantee you won’t get them. That said, a combination of steady weight gain, consistent skin hydration, and targeted topical ingredients can reduce your risk or limit their severity. Understanding what actually works, and what doesn’t, starts with knowing why they form in the first place.
Why Pregnancy Causes Stretch Marks
Stretch marks aren’t surface-level damage. They form in the dermis, the thick middle layer of your skin, when it’s stretched faster than it can adapt. As your belly, breasts, hips, and thighs expand during pregnancy, immune cells in the skin release enzymes that break down elastin, the protein responsible for your skin’s ability to snap back. Collagen fibers then reorganize in a disorderly way, leaving visible streaks that start out red or purple and eventually fade to a lighter, silvery tone.
Pregnancy hormones accelerate this process. Elevated cortisol levels, which naturally rise during pregnancy, make the skin’s connective tissue more fragile and less resilient. This is the same reason people who use corticosteroid medications or have conditions that raise cortisol levels develop stretch marks even without pregnancy. Your skin is essentially caught between rapid expansion and hormonally weakened structural support.
Your Biggest Risk Factors
Genetics play a larger role than most people realize. If your mother or sisters developed stretch marks during pregnancy, your odds go up significantly. A large study in the Journal of the American Academy of Dermatology found family history to be one of the strongest predictors.
Age matters too, and younger skin is actually more vulnerable. In that same study, 84% of women under 20 developed stretch marks, compared to just 24% of women 30 and older. Women under 20 were roughly 25 times more likely to develop them than women over 30. This may seem counterintuitive since younger skin is often thought of as more resilient, but the rapid growth patterns and hormonal shifts in younger pregnancies appear to overwhelm the dermis more easily.
Higher pre-pregnancy BMI also increases risk. For every one-unit increase in BMI before pregnancy, the likelihood of developing stretch marks rose by about 25% in the same study. Carrying multiples, gaining weight rapidly, and having a larger baby all add to the total stretch your skin has to accommodate.
Manage Weight Gain Gradually
You can’t prevent your belly from growing, but the rate of growth matters. Rapid weight gain stretches skin faster than it can remodel, so keeping your gain within recommended ranges is one of the most practical things you can do. The current guidelines based on pre-pregnancy BMI break down like this:
- Underweight (BMI under 18.5): 28 to 40 pounds total
- Normal weight (BMI 18.5 to 24.9): 25 to 35 pounds total
- Overweight (BMI 25 to 29.9): 15 to 25 pounds total
- Obese (BMI 30 or higher): 11 to 20 pounds total
For twin pregnancies, the targets are higher: 37 to 54 pounds for normal-weight women, 31 to 50 for overweight women, and 25 to 42 for obese women. The goal isn’t to restrict calories or diet during pregnancy. It’s to gain steadily rather than in sudden surges, especially during the second and third trimesters when skin stretching accelerates.
What Actually Helps Your Skin
Keeping skin well-hydrated won’t rebuild damaged elastin, but it does improve the skin’s pliability, which may help it handle stretching with less tearing in the dermis. The key is consistency. Applying a rich moisturizer to your belly, breasts, hips, and thighs daily starting in the first trimester gives your skin the best chance to stay supple as it expands over the following months.
Two ingredients have the most clinical support. Hyaluronic acid, which pulls moisture into the skin and helps maintain its flexibility, has shown benefit in some studies when applied topically during pregnancy. Centella asiatica extract (sometimes listed as “cica” or “tiger grass” in skincare products) supports collagen production and has been studied specifically for stretch mark prevention, with some evidence of reduced severity.
Tretinoin (prescription-strength vitamin A) is the gold standard for treating existing stretch marks, but it is not safe during pregnancy. Save this option for postpartum if needed.
What Doesn’t Work
Cocoa butter is the most commonly recommended remedy for pregnancy stretch marks, and it doesn’t work. Clinical trials have compared cocoa butter to plain lotion and found no difference in stretch mark development. The same goes for olive oil, coconut oil, and shea butter. As the Cleveland Clinic summarizes, none of these natural oils have been shown to outperform basic moisturizers when it comes to preventing stretch marks.
This doesn’t mean these products are useless for your skin. They’re fine moisturizers that can relieve the itching and dryness that come with stretching skin. They just won’t prevent the structural damage happening deeper in the dermis. If you enjoy using cocoa butter, there’s no reason to stop, but don’t expect it to do something it can’t.
Hydration, Nutrition, and Skin Health
Drinking enough water supports skin elasticity from the inside. Dehydrated skin is less pliable and more prone to damage under mechanical stress. While no specific water intake has been proven to prevent stretch marks, staying well-hydrated during pregnancy (typically 8 to 12 cups a day) is a low-effort way to support your skin alongside everything else it does for your pregnancy.
Certain nutrients contribute to collagen and elastin production. Vitamin C is essential for collagen synthesis, and zinc supports tissue repair. Eating a varied diet rich in fruits, vegetables, lean protein, and whole grains gives your body the raw materials it needs to maintain and repair skin. Vitamin E, found in nuts, seeds, and avocados, also plays a role in skin health, though supplementation beyond normal dietary intake hasn’t been proven to prevent stretch marks specifically.
What to Realistically Expect
Even if you do everything right, you may still get stretch marks. With up to 90% of pregnant women developing them to some degree, they are closer to a normal part of pregnancy than a preventable complication. Genetics and hormones drive much of the outcome, and those aren’t things you can control with a cream or a meal plan.
Stretch marks typically appear in the late second or third trimester, when growth is fastest. They often show up on the lower abdomen, but the breasts, hips, thighs, and buttocks are all common sites. Fresh marks are usually red, pink, or purple and may feel slightly raised or itchy. Over the 6 to 12 months after delivery, they gradually flatten and fade to a paler color that blends more with surrounding skin, though they rarely disappear entirely on their own.
If you develop stretch marks and want to treat them after pregnancy, options like tretinoin, laser therapy, and microneedling can improve their appearance. These treatments work best on newer, still-pigmented marks rather than older, faded ones, so earlier postpartum treatment tends to produce better results.