title: The impact of Roux-en-Y gastric bypass surgery for morbid obesity on second trimester obstetric ultrasound completion rates.
abstract: OBJECTIVE
  Weight loss after bariatric surgery occurs by preferential loss of visceral and central body fat. We hypothesized that 2nd trimester sonographic completion rates would be higher among women with prior gastric bypass compared with women of similar body mass index without a prior gastric bypass.
  
  
  METHODS
  Women with gastric bypass undergoing 2(nd) trimester sonographic examination were matched 1:1 with controls for body mass index and prior cesarean section. The primary outcome was completion of the fetal anatomic evaluation according to American Institute of Ultrasound in Medicine guidelines.
  
  
  RESULTS
  Initial sonogram completion rates for cases, 28/40 (70%), and controls (30/40, 75%) were similar (p = 0.62). Completion rates for women returning for follow-up were 100% in both groups. Overall completing rates were identical for cases (37/40, 92.5%) and controls (37/40, 92.5%).
  
  
  CONCLUSIONS
  Previous gastric bypass surgery does not affect 2nd trimester sonographic completion rates.
authors.affiliation: Department of Obstetrics and Gynecology, Maine Medical Center, Portland, ME, USA.
authors.forename: Joseph R
authors.initials: JR
authors.lastname: Wax
authors.forename: Angelina
authors.initials: A
authors.lastname: Cartin
authors.forename: Michael G
authors.initials: MG
authors.lastname: Pinette
authors.forename: Jacquelyn
authors.initials: J
authors.lastname: Blackstone
mesh_terms: D000328:Adult; D015992:Body Mass Index; D005260:Female; D015390:Gastric Bypass / Q000379:methods*; D006801:Humans; D009767:Obesity, Morbid / Q000601:surgery*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016216:Ultrasonography, Prenatal / Q000379:methods* / Q000706:statistics & numerical data*