Pregnancy does widen your hips, but most of that change is temporary. The pubic joint typically expands by 3 to 5 millimeters during pregnancy and returns to its original width within about five months. The hormone relaxin, which loosened your pelvic ligaments to make delivery possible, stays elevated for up to 12 months postpartum, meaning your joints remain somewhat flexible during that window. But once relaxin drops back to baseline, your skeletal structure largely returns to where it started. So keeping your hips wider after pregnancy is less about preserving bone changes and more about building muscle volume and managing fat distribution in that region.
What Actually Changes During Pregnancy
Your pelvis widens in two ways during pregnancy: the bones shift apart slightly at the pubic symphysis (the joint at the front of your pelvis), and your soft tissues, including ligaments and cartilage, stretch under the influence of relaxin. The normal pubic symphysis width is 4 to 5 millimeters. During pregnancy it can reach up to 9 millimeters, and anything beyond 10 millimeters is considered excessive separation.
That bony widening is not permanent for most women. The joint narrows back to its pre-pregnancy size within roughly five months after delivery. Some women do retain a slightly wider pelvis after multiple pregnancies, but the difference is usually small and not something you can reliably control.
Fat distribution also shifts. During pregnancy, your body deposits fat specifically in the hip, thigh, and lower body regions. This is driven partly by estrogen, which promotes subcutaneous (under-the-skin) fat storage in the hips and thighs rather than deeper visceral fat around the organs. Premenopausal women naturally accumulate fat in these lower-body areas, and pregnancy amplifies the pattern.
Why Hip Fat Tends to Disappear Postpartum
Your body stored that hip and thigh fat for a reason: it’s rich in long-chain fatty acids that support infant brain development. During breastfeeding, your body preferentially pulls fat from the hip and thigh region to supply those nutrients through breast milk. Research on skin-fold thickness consistently shows fat accumulating in the hip and thigh areas during pregnancy and then mobilizing from those exact spots during lactation. Women who breastfed for more than seven months had measurably smaller hip and thigh circumferences compared to pregnant women or women who had never been pregnant.
This means breastfeeding actively works against hip fat retention. That’s not a reason to stop breastfeeding, but it explains why many women notice their hips narrowing during the months they nurse. In the broader picture, gynoid fat (the fat stored around hips and thighs) tends to decrease most between 6 to 8 weeks and 6 months postpartum, then stabilizes.
Building Hip Width Through Muscle
The most reliable way to maintain or increase hip width after pregnancy is to build the gluteus medius, the muscle that sits on the outer side of each hip. Unlike bone or fat, muscle volume is something you can directly control and sustain over time. A larger gluteus medius adds visible width to the hip area and also stabilizes your pelvis, which matters after the ligament loosening of pregnancy.
Effective gluteus medius training combines two types of exercises. Start each session with heavier compound movements like squats, deadlifts, lunges, and step-ups. These can be progressively loaded with more weight over time, which is what drives actual muscle growth. Follow those with lighter, targeted exercises like side-lying leg raises, clamshells, or banded lateral walks to fatigue the muscle further.
A few practical guidelines for programming:
- Sets and frequency: Aim for 3 to 5 sets per exercise, training the hip muscles twice per week. Going beyond two sessions weekly isn’t necessary and can lead to technique breakdown as fatigue builds.
- Progressive overload: Gradually increase the weight from session to session while reducing repetitions slightly. This progressive challenge is what signals the muscle to grow.
- Unilateral work: If one hip feels weaker than the other (common after pregnancy), prioritize single-leg exercises like lunges or single-leg squats. Train the weaker side first and match the stronger side to whatever the weaker side can handle.
- Contralateral loading: Holding a weight in the hand opposite your working leg during forward lunges activates the gluteus medius more than the quadriceps or hamstrings, making it an especially efficient hip-building exercise.
Give yourself time to ease back into resistance training postpartum, especially during the first 12 months when residual relaxin keeps your joints looser than usual. Start lighter than you think you need to, focus on form, and build up gradually.
Nutrition and Hormonal Factors
Estrogen is your ally for hip-area fat storage. As long as you’re premenopausal, your body naturally favors depositing subcutaneous fat in the lower body, hips, and thighs. Higher estrogen levels promote this pattern, expanding fat cells in those regions through healthy cell multiplication rather than the unhealthy cell swelling that happens with visceral fat.
To support this natural distribution, maintaining adequate calorie intake matters. Severe calorie restriction postpartum can lower estrogen levels and shift your body toward losing subcutaneous hip fat while potentially increasing visceral fat. Eating enough protein (to support muscle growth in the glutes) and enough overall calories (to avoid hormonal disruption) gives your body the best chance of holding onto hip-area fullness. There’s no specific food that targets hip fat retention, but chronically undereating works against it.
Pelvic Belts and Other Supports
Pelvic belts are sometimes marketed as tools for shaping your postpartum pelvis. The research on these is limited but offers some insight. A prospective study found that women who wore pelvic belts consistently during and after pregnancy had less pelvic asymmetry postpartum compared to women who only wore them after childbirth or not at all. The effect was most noticeable when belts were worn at least 7 hours per week and appeared to influence the posterior (back) width of the pelvis more than the front.
That said, these belts are primarily studied for pelvic alignment and stability, not for cosmetically maintaining hip width. They may help your pelvis settle into a more symmetrical position, but they won’t prevent the natural narrowing that occurs as relaxin levels drop.
Cosmetic Procedures
For women who want a more dramatic or permanent change, fat transfer to the hips is an option. The procedure removes fat from areas like the abdomen or thighs through liposuction, then reinjects it into the hips to add volume and enhance the waist-to-hip ratio. You need enough donor fat on your body to be a good candidate, which is more likely in the postpartum period than later. Results look natural because the volume comes from your own tissue, but not all transferred fat survives long-term, so some volume loss is expected. Most plastic surgeons recommend waiting until you’re finished having children and your weight has stabilized before considering this.
What to Realistically Expect
Some women do keep slightly wider hips permanently after pregnancy, particularly after multiple pregnancies. But most of the visible width change comes from soft tissue, not bone, and it naturally recedes in the first year. The factors you can control are muscle mass in the gluteus medius (which adds lateral hip volume), overall body composition (maintaining enough body fat to preserve the subcutaneous stores in your hip region), and caloric intake (avoiding the steep deficits that strip lower-body fat first).
Building your glutes is the single most effective and sustainable strategy. It’s the one variable that responds directly to effort, doesn’t depend on hormonal timing, and produces results that last as long as you maintain the training.