Can diet and exercise before pregnancy reduce baby fat?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion criteria: All subjects will have had by the time of randomization at 3 months postpartum: 1. Planning another pregnancy within the next 24 months 2. Planning to deliver at Tufts medical center during their next pregnancy 3. A previous full-term singleton pregnancy (gestational age \> 37 weeks) 4. 18 to 40 years of age at the time of enrollment into the study 5. Vaginal or cesarean delivery 6. Normal glucose tolerance or gestational diabetes (GDM), but without evidence of postpartum diabetes as defined by a 75 g 2-hr oral glucose tolerance test (OGTT) 7. Normal blood pressure or mild preeclampsia but normal postpartum blood pressure 8. Bottle or breast feeding 9. Normal thyroid function (determined by TSH concentration in blood), normal cell blood count and normal kidney and liver functions. Lipid profile with triglyceride levels not higher than 400 mg/dl (fasting) and LDL levels less than 180 mg/dL 10. No clinical signs or symptoms of cardiovascular disease or any other disease or condition that may contraindicate participation in exercise training (i.e. COPD, severe asthma, orthopedic abnormalities) 11. Using contraception Exclusion criteria: 1. Pre or post-delivery diabetes 2. Post-delivery hypertension requiring medication 3. asthma requiring more than occasional use of a sympathomimetic inhaler, but not chronic inhaled steroids 4. Inflammatory bowel disease 5. Need for assisted reproductive technologies to become pregnant 6. Medical or obstetrical contraindication to the defined exercise program or diet 7. Tobacco, excessive alcohol use (greater than 2 drinks/day) or illicit drug use 8. Eating disorders such as bulimia 9. Gastric surgery to lose weight including banding or bypass procedures 10. Any psychological or psychiatric condition which may impair participation in the lifestyle intervention program 11. Multiple pregnancy 12. HIV, or hepatitis B or C 13. If a LIPP subject becomes pregnant prior to 16 weeks after randomization before the weight- loss phase for the lifestyle intervention is completed or a control subject becomes pregnant before the 3 month postpartum randomization, i.e. no baseline measurement.