obesity and reproduction obesity awareness symposium: 2102 october 26, 2012 jane nani, m.d....
TRANSCRIPT
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Obesity and Reproduction
Obesity Awareness Symposium: 2102
October 26, 2012
Jane Nani, M.D.Fertility Centers of Illinois
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Scope of the ProblemPercent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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Percent of Obese (BMI > 30) in US Adults
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INTRODUCTION
Prevalence of Obesity
Nationally
Globally
Impact of Obesity
Natural fecundity
ART
Childhood obesity
Allocation of reproductive resources
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Centers FOR Disease control
2005-2006: 34% of US adults older than 20 years had BMI higher than 30mg/kg.
Most common chronic condition in US– 31% non-Hispanic white– 38% Hispanics– 49% non-Hispanic blacks
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Centers for disease control : 2010
No state had less that 20%
36 states: prevalence of 25% or greater
12 of these: prevalence of 30% or greater
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Body mass index: 1998 NIH
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THE MOST COMMON DISEASE IN THE U.S.
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Global Obesity
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World Health organization
PREVALENCE OF OBESITY IN 2010 HIGHEST: PACIFIC ISLANDS ~ 80% LOWEST: INDIA ~ 1%
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Impact on health care
300,000 deaths in the US each year Diabetes Hypertension Obstructive Sleep Apnea Cancer: breast, endometrial, ovarian, colon Dyslipidemia Cardiovascular Disease
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Why are we so fat?
“Human appetite is elastic: give us more and we’ll eat more”.
The New Yorker, July 20, 2009
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Impact on Reproductive Health
Gynecology– Early puberty– DUB– Urinary incontinence– Breast cancer– Endometrial cancer
Fertility– ART– Increased Miscarriages– Adverse Obstetrical
Outcome
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Menstrual cycle disturbances
30-50% of overweight & obese have cycle irregularity Correlation with increasing BMI and increased truncal obesity
Douchi t et al, Acta Obstet Gynecol Scand 2002
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INFERTILITY
ANOVULATION: COMMON CAUSE INCREASE BMI: INCREASE RISK of ANOVULATION WEIGHT LOSS IMPROVES OVULATION
Shah DK, et al. Curr Opin Obstet Gynecol, 2010
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Polycystic ovarian syndrome (PCOS)
MOST COMMON ENDOCRINOPATHY – Not all obese women have PCOS– Not all women with PCOS are obese
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Fasting Insulin and Cycle frequency
Conway G. et al. JCEM, 1996
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Obesity and PCOS
Insulin Resistance Hyperinsulinemia Decreased SHBG Increased free testosterone Increased peripheral aromatization Relative increased estrogen Altered negative pituitary feedback
Catalano PM, et al. Reproduction 2010
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Insulin in lean & classic PCOS
Conway G, et al. JCEM 1996
Majority of women with PCOS regardless of weight have insulin resistance
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20-year follow-up: PCOS Longitudinal Study 193 PCOS women Aged 20-25 Followed at 5 year intervals over 20 years Focus: metabolic changes with aging
Carmina E, et al. Obstet Gynecol, 2012
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20-year follow-up: PCOS
0102030405060708090
100
InitialVisit
Year5
Year10
Year15
Year20
Testosterone
BMI
Insulin
WaistCircumference
Carmina E, et al. Obstet Gynecol 2012
**
**
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OVULATORY OBESE WOMEN
LONGER TIME TO CONCEIVE 4% per kg/m2 decrease in natural conception in women with BMI > 29
kg/m2
H-P-O AXIS DYSREGULATION LONGER FOLLICULAR PHASAE SHORTENED LUTEAL PHASE
van der Steeg JR, et al. Hum Reprod, 2008
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Impact of obesity on Male fertility
Case-Cohort 2,157 men Ages: 17-67 All SA parameters decreased in age 20-30 yr: Count negatively correlated in BMI
Paasch U, et al. Fertil Steril, 2010
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Effect of obesity on Male fertility Incidence of oligospermia and asthenospermia increase with BMI:
– 5.3% and 4.5 % in normal men– 9.5% and 8.9% in overweight men– 15.6% and 13.3 % in obese men
Hammoud AO, et al. Feril Steril, 2008.
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Etiology: BMI assoc. Infertility in men
Abnormal reproductive hormones Increased adipose-derived E2
Reduced total testosterone levels Gonadotropin suppression (negative E2 feedback) Increased Scrotal Temperature Erectile Dysfunction
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Impact of obesity on Natural fecundityOutcome Type of Study Number of pts. Reference
Subfertile Prospective Cohort
4901 Nohr et al. 2009
Subfertile Large Case-Control
2527 subjects46,718 controls
Rich-Edwards et al. 1994
Subfertile Prospective 7327 Gesink-Law et al. 2007
Subfertile Prospective Cohort
500 Zaadstra BM et al. 1993
Subfertile Prospective Cohort
1651 Wise LA, et al. 2010
Subfertile Prospective Cohort
3029 Van der Steeg et al. 2008
Subfertile Prospective 12073 Jokela et al. 2008
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RETROSPECTIVE DATA: FCI
Effect of BMI on IVF outcome 2167 cases: first cycle of IVF January, 2005 – March, 2006 Clinical pregnancy rate: main outcome BMI alone: no impact on IVF outcome
Sneed ML, et al. Hum Reprod, 2008
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Clinical Pregnancy Rate
0
10
20
30
40
50
60
70
80
90
18 20 22 24 26 28 30 32 34 36 38 40
Cli
nic
al P
reg
na
nc
y R
ate
BMI
20 25 30 35 40
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Conclusion
At younger ages, high BMI has a profound negative influence on IVF pregnancy rates but this effect diminished with increasing age.
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IVF outcomes in obese patientsDegree of Difference
Number of Patients
Study Type Main outcome Reference
No difference 1293 Retrospective Clinical Pregnancy Rate
Dokras et al 2006
Decreased 3586 Retrospective Clinical Pregnancy Rate
Wang et al. 2000
Decreased 5019 Retrospective Live Birth Rate Fedorcsak et al. 2004
No difference 2167 Retrospective Clinical Pregnancy Rate
Sneed et al. 2008
Decreased 8457 Retrospective Live Birth Rate Lintsen et al. 2005
Decreased 516 Retrospective Clinical Pregnancy Rate
Orvieto et al. 2009
No Difference 113 PCOS Retrospective cohort
Clinical Pregnancy Rate
Shalom-Paz et al. 2011
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IVF outcomes in Obese patients
Higher cycle cancellation rate More days of gonadotropins Higher doses of gonadotropins Lower peak estradiol levels Lower oocyte yield Lower fertilization rate
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EFFECTS OF OBESITY IN REPRODUCTIVE DEVELOPMENT
Stage of Development
Proposed mechanism
Possible effects on reproduction
Evidence References
OOCYTE Abnormal GnRHpulsatility, follicular development
Poor oocyte quality, impaired ovulation
Human IVF specimens, serum samples
Jain A, et al. 2007Robker RL, et al. 2009
Preimplanta-tion Embryo
Impaired embryonic metabolism
Impaired implantation, miscarriage
Human IVF specimens
Metwally M, et al. 2007Carrell DT, et al. 2001
Implantation Abnormal endometrium
Impaired implantation, miscarriage
Human endometrial biopsies
Mozzanega B, et al. 2004
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Obstetrical complications
PREECLAMPSIA GESTATIONAL DIABETES MACROSOMIA SHOULDER DYSTOCIA CESAREAN DELIVERY BIRTH DEFECTS
NEONATAL ACIDOSIS NEONATAL RESP.
COMPLICATIONS ANESTHETIC
COMPLICATIONS VBAC FAILURE MISCARRIAGE
WHO Consultants on Obesity. June, 1997
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Adverse Pregnancy outcomes
Gestational Diabetes: 20% of pregnancies in women who are obese 4-fold increased Hypertension: 2- to 3-fold increased odds of preeclampsia
Weiss JL, et al. Am J Obstet Gynecol,2004.
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Maternal obesity & Pregnancy complications
Population-based cohort All Danish women with singleton birth Danish Medical Birth Registry 2004- June 2010 N = 369,347 Overweight: 20.9% Obese: 7.7% Severe Obesity: 4%
Per Ovesen, et al. Obstet Gynecol, 2011
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Adjusted odds ratios (OR)
Overweight Obese Severe ObesityGestational DM 3.5 7.7 11.0Preeclampsia 1.9 3.0 4.4Macrosomia 1.6 2.2 2.7Low Apgars 1.3 1.4 1.9Stillborn 1.4 1.6 1.9
Per Ovesen, et al. Obstet Gynecol, 2011
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Position of the American Dietetic association & the American society for nutrition
All overweight and obese women of reproductive age should receive counseling on the roles of diet and physical activity in reproductive health prior to pregnancy, during pregnancy, and in the inter conceptional period, in order to ameliorate adverse outcomes.
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Is Maternal Obesity a risk factor for childhood obesity?
The offspring of obese women face an increased risk of obesity and other chronic metabolic diseases.
Even normal birth weight offspring of obese mothers are more likely to be obese than normal weight mothers.
Oken E, et al Obese Res, 2003
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Childhood Obesity
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2007—2009 County Obesity Prevalence Among Low-Income Children Aged 2 to 4
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2009 State Prevalence AmongLow-Income Children Aged 2 to 4 Years
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Should fertility services be conditional on BMI?
Treatment decisions/restrictions are made at the provider/clinic level Ongoing discussion among REIs Differences in use of fertility services according to female body mass
Vahratian A, et al. Hum Reprod, 2009
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Resource allocations for Obese pts.
Extensive debate in countries where fertility treatment is publicly funded
Analysis of cost-effectiveness Risks & benefits Poor success rates and obstetrical outcomes Calls for restricting fertility treatment for obese women
Pandey S, et al. Hum Reprod, 2010
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Management of obesity
Diet and exercise Medical Treatment
– Anti-absorptive drugs• Orlistat
– Appetite suppressants• Phentermine• Sibutramine
Insulin-sensitizing agents– Metformin
Cannabinoid receptor antagonists– Rimonabant
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Bariatric Surgery
Several Case Series Compare outcomes in women pre- and postoperatively Lower rates of gestational diabetes Lower hypertensive complications
Fewer children born with size and metabolic abnormalities
Smith J, et al. JCEM 2009
Bennett WL, et al. BMJ 2010
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Conclusions
Obesity prevalence has reached epidemic proportion Prospective studies are needed to better understand ART success in
the obese