title: Association of physical activity in the past year and immediately after in vitro fertilization on pregnancy.
abstract: OBJECTIVE
  To estimate the association of physical activity on in vitro fertilization (IVF).
  
  
  METHODS
  Prospective cohort study.
  
  
  METHODS
  Academic infertility clinic.
  
  
  METHODS
  Women (n = 121) undergoing nondonor IVF embryo transfer (fresh or frozen).
  
  
  METHODS
  The women completed a questionnaire on past year physical activity and wore an accelerometer from embryo transfer to serum pregnancy testing.
  
  
  METHODS
  Implantation, intrauterine gestation, and live birth.
  
  
  RESULTS
  Based on self-reported past year physical activity, the adjusted odds of intrauterine gestation was higher among those that had higher continuous active living (odds ratio [OR] 1.96, 95% confidence interval [CI] 1.09-3.50), sports/exercise (OR 1.48, CI 1.02-2.15), and total activity (OR 1.52, 95%CI 1.15-2.01) indices. After embryo transfer, women did almost no vigorous activity (median 0 min/d) as measured by the accelerometer. More of their time was spent in light activity (median 3.0 h/d) and sedentary behaviors (median 9.3 h/d). Accelerometer-measured physical activity and sedentary behavior after embryo transfer were not associated with any IVF outcome.
  
  
  CONCLUSIONS
  An active lifestyle in the preceding year favorably impacted the IVF outcome. After embryo transfer, women engaged in mostly light physical activity and sedentary behaviors; therefore, the impact of vigorous physical activity on implantation could not be determined.
authors: Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina. Electronic address: kelly_evenson@unc.edu.
authors: Kelly R
authors: KR
authors: Evenson
authors: Department of Obstetrics and Gynecology, School of Medicine, University of North Carolina, Chapel Hill, North Carolina; Atlanta Center for Reproductive Medicine, Atlanta, Georgia.
authors: Kathryn C
authors: KC
authors: Calhoun
authors: Carolina Population Center, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina; Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina.
authors: Amy H
authors: AH
authors: Herring
authors: Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina.
authors: David
authors: D
authors: Pritchard
authors: Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina.
authors: Fang
authors: F
authors: Wen
authors: Department of Obstetrics and Gynecology, School of Medicine, University of North Carolina, Chapel Hill, North Carolina.
authors: Anne Z
authors: AZ
authors: Steiner
mesh_terms: D056044:Actigraphy / Q000706:statistics & numerical data*; D000328:Adult; D004624:Embryo Transfer / Q000706:statistics & numerical data*; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D007247:Infertility, Female / Q000453:epidemiology* / Q000503:physiopathology / Q000534:rehabilitation*; D050498:Live Birth / Q000453:epidemiology*; D008875:Middle Aged; D009043:Motor Activity; D009657:North Carolina / Q000453:epidemiology; D011247:Pregnancy; D013177:Sports / Q000706:statistics & numerical data*; D016896:Treatment Outcome; D055815:Young Adult
keywords: Accelerometry; conception; implantation; pregnancy; questionnaire; sedentary behavior