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A pregnant person wrote in worried because they stopped taking weight-loss peptides when they found out they were five weeks pregnant, and by 12 weeks they’ve already gained 30–35 pounds. They’d lost 120 pounds before pregnancy and are terrified of regaining all that weight. Their bloodwork so far looks fine and they don’t have signs of diabetes, but they’re struggling with constant thoughts about food and body changes. When people talk about "peptides" for weight loss, they often mean prescription drugs that mimic hormones that reduce appetite or change how the body handles food. Examples you may have heard are semaglutide (the drug behind brand names like Ozempic or Wegovy) or newer, less familiar peptide combinations. These drugs essentially tell the brain "you’re full" more easily and slow stomach emptying, so people eat less. They are powerful enough that stopping them can change appetite and eating patterns quickly. What the message describes is a common pattern after stopping these medicines: appetite rebounds. Most evidence about rapid weight gain after stopping comes from people’s reported experiences and from clinical trial data showing weight tends to creep back when treatment stops. In pregnancy there’s also normal, healthy weight gain driven by the baby, placenta, extra blood and fluids, and breast tissue. The note doesn’t report a formal study — it’s a single person’s experience — so we can’t say how typical the exact numbers are. Still, jumping from very low appetite on a drug to normal or heightened appetite off it can feel dramatic, and early pregnancy can include strong food cravings or aversions that add to the effect. Why this matters: if you used a peptide to lose a lot of weight and then stop because of pregnancy, it’s normal to worry about rapid weight gain. For most pregnancies, the priority is the health of the baby and mother; moderate weight gain is expected and often healthy. But the mental strain of fearing big weight regain is real and can affect mood, sleep, and nutrition choices. People who worked hard to lose weight may want guidance to balance healthy pregnancy weight gain with maintaining long-term health goals. Talking with your obstetrician and a dietitian who understands pregnancy and weight history can help set realistic expectations and a plan. Caveats and risks: many weight-loss peptides are not recommended in pregnancy because we don’t have strong safety data for the fetus. That’s likely why the person stopped them. Weight gain during pregnancy varies; massive gains tied to overeating aren’t inevitable, but so is some gain. If you have high-risk conditions (like diabetes), weight and blood sugar need closer monitoring. Mental health matters too — anxiety about weight can lead to harmful behaviors. Always check medication advice with your doctor and get support from prenatal care, ideally including a nutrition professional. If you’re feeling overwhelmed, ask your care team about safe strategies and about when it might be reasonable to restart medications if that will be part of postpartum planning. Bottom line: stopping appetite-suppressing peptides in pregnancy often leads to quicker return of appetite and noticeable weight gain, but pregnancy-related weight is expected and your care team can help you manage it safely while protecting your and your baby’s health.
Source: r/Peptides