Inclusion Criteria:  Female adults at least 18 years of age  A BMI of 35-39.99 and 1 or more severe obesity-related co-morbidities  --including T2D,112 hypertension, hyperlipidemia, obstructive sleep apnea (OSA), obesity-hypoventilation syndrome (OHS), Pickwickian syndrome (a combination of OSA and OHS), nonalcoholic 4 fatty liver disease (NAFLD) or nonalcoholic steatohepatitis (NASH), pseudotumor cerebri, gastroesophageal reflux disease (GERD), asthma, venous stasis disease, severe urinary incontinence, debilitating arthritis, or considerably impaired quality of life) OR a BMI ≥ 40  Tissue diagnosis (usually endometrial biopsy) of grade 1 endometrial carcinoma or EIN.  Exclusion Criteria:  Younger than 18 years old BMI < 35 Without a tissue diagnosis, or with a grade 2 or greater endometrial cancer tissue diagnosis Pregnant participants will be excluded from this study.  Patients with contraindications to bariatric surgery will also be excluded.  --This includes active smokers, prior bariatric surgery, active substance abuse, recent suicide attempt, bulimia nervosa, large abdominal hernias, or poorly controlled psychiatric illness  include inability to read an English informed consent form, and unwillingness to provide informed consent.