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Fertility Preservation Options
for Cancer Patients
Jeff Roberts M.D.
Co-Director
Pacific Centre for Reproductive Medicine
Vancouver, British Columbia
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COI Disclosures
Presentation includes discussion of the following off- label use of a
drug or medical device: GnRH agonists, letrozole
Research Support/P.I. N/A
Employee N/A
Consultant N/A
Shareholder Pacific Centre for Reproductive Medicine
Speakers Bureau N/A
Honoraria N/A
Scientific Advisory Board N/A
In compliance with accreditation, we require the following disclosures to the session audience:
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Fertility Preservation Funding
• Provincial programs• Provincial contracts (Ontario)
• Provincial medical services (Quebec)
• Tax credit (Manitoba)
• Fertile Future ($3000 female $350 male)
• IVF clinic discounts
• Pharmaceutical support (compassionate medications)
• Funding initiatives
• The Walking Egg (2010) www.thewalkingegg.com (Collaboration with ESHRE and WHO)
• Friends of Lo-Cost IVF (2011) www.freindsoflcivf.org
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Overview
Male cancer patient
Female cancer patients
Assessment of fertility
Impact of cancer treatments
Fertility preservation options
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Number of Cancer Survivors Increasing
Canadian Cancer Statistics 2019 – Canadian Cancer Society
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Overview
Male cancer patient
Female cancer patients
Assessment of fertility
Impact of cancer treatments
Fertility preservation options
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Chemotherapy in Male
Common for patients to present with oligo/azospermia (fever-related, or direct effect)
Gonadal dysfunction 70-98% depending on follow-up period1-5
Azoospermia and oligospermia – epithelial effect
Loss of Leydig cell function will result in hypogonadism but uncommon
Azospermia from HL and NHL can regain spermatogenic capacity at varying times (keep testing)
1. Rivkees SA, Crawford JD. JAMA. 1988;259:2123-2135.2. Bramswig JH et al. Cancer. 1990;65:1298-1302.3. Green DM et al. J Clin Oncol. 2010; 28:332-339.4. Meistrich ML et al. Cancer. 1992;70:2703-2712.5. Heikens J et al. Cancer. 1996;78:2020-2024.6.Thomson AB et al. Lancet. 2002;360:361-367.7. Green DM et al. J Clin Oncol. 2010; 28:332-339. 8. Leader et al. BJH 2011;153:291-308
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Chemotherapy in Male
Compared with siblings, cancer survivors are approximately 50% more likely to be infertile > 5 years following treatment (CCSS studies)6
Over 60% survivors achieve fatherhood without IVF/ICSI9
Elevated risk of fetal malformation for up to 2 years following chemotherapy10
1. Rivkees SA, Crawford JD. JAMA. 1988;259:2123-2135.2. Bramswig JH et al. Cancer. 1990;65:1298-1302.3. Green DM et al. J Clin Oncol. 2010; 28:332-339.4. Meistrich ML et al. Cancer. 1992;70:2703-2712.5. Heikens J et al. Cancer. 1996;78:2020-2024.6.Thomson AB et al. Lancet. 2002;360:361-367.7. Green DM et al. J Clin Oncol. 2010; 28:332-339. 8. Leader et al. BJH 2011;153:291-308, 9. Kiserud et al. BJC 2007;96:1442-1449 10. Guilaume et al. F&S 2016341-350, 107(2):
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Sperm Cryopreservation
Most established fertility preservation technique for mensupported by large cohort studies
ASCO recommends sperm cryopreservation prior to initiating cancer treatment
• Recommend 3 samples separated by 48 hours of abstinence, with each ejaculate in multiple straws
Loren AW et al. J Clin Oncol.;epub
http://jco.ascopubs.org/content/early/2013/05/24/JCO.2013.49.2678.full.pdf+html. Accessed June 12, 2013.
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Overview
Male cancer patient
Female cancer patients
Assessment of fertility
Impact of cancer treatments
Fertility preservation options
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Infertility distress can affect overall mood and PTSD1
• Psychological stress level of infertility ranks with that of cancer2
• Lack of knowledge about their own reproduction and existing reproductive technologies
• 75% of childless cancer patients want children in the future3,4
1. Schover LR et al. Pediatr Blood Cancer. 2009;53:281-2842. Domar et al J Psychosom Obstet Gynaecol 1993;14 Suppl:45-523. Schover LR et al. Cancer. 1999;86:697-709.4. Schover LR et al. J Clin Oncol. 2002;20:1880-1889.
Young Female Cancer Patient
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Goals of Fertility Preservation
Hope for motherhood
Increased probability of pregnancy in future
In terms of the cancer
• NOT affect cure
• Positive distraction
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Overview
Male cancer patient
Female cancer patients
Assessment of fertility
Impact of cancer treatments
Fertility preservation options
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Fresh Own Egg IVF Success by Age
www.pacificfertility.ca
CDC/SART Assisted Reproduction Technologies 2015 National Summary Report
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Filippi et al. Pediatrics 2016;138(4):e20160291
Impact of chemotherapy
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Ovarian Reserve Testing
• Estimate risk of ovarian failure from cancer treatment
• Counseling on the impact of treatment on reproductive lifespan
• Estimation of the yield of eggs with ovarian stimulation/IVF
• Determine gonadotropin dose required to achieve an optimal egg yield
• Determine accessibility of ovaries for egg retrieval procedure (ultrasound)
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Testing Ovarian Reserve - Day 3 FSH
• Pituitary gonadotropin closely linked to ovarian reserve and egg quality
• MSP-insured
• Low in the early follicular phase
• Often used for predicting IVF success rates
- Pregnancy OR 0.58 when ≥ 10 IU/L1
- Sensitivity 7% and PPV 90+%2
1. Yanushpolsky EH, et al. Fertil Steril 2003. 80:111-115
2. Jain T et al. Fertil Steril 2004. 82: 180-185
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Testing Ovarian Reserve - Antral Follicle Count (AFC)
• Performed early follicular phase by transvaginalultrasound
Antral follicle = 2-9 mm
Normal values: 4-10 per ovary
• Declines with ageBefore age of 37: 4.8% per year
After age of 37: 11.7% per year
• Valuable screening tool for IVF
Scheffer GJ et al. Fertil Steril 1999. 72: 845-51
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Testing Ovarian Reserve - Antimullerian Hormone (AMH)
• Secreted from granulosa cells of growing follicles
• AMH is the “follicular gatekeeper” that limits the size of the cohort available to respond to pituitary gonadotropins each month1-2
• Cycle day independent – dominant follicle and corpus luteum do not secrete
• Best screening test for ovarian response for predicting ovarian response and monitoring of reserve after treatments and over time
1. Dewailly D et al. Oxford University Press; 2014 May;20(3):370–85. 2. Durlinger AL, et al. Endocrinology. 1999 Dec;140(12):5789–96.
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Overview
Male cancer patient
Female cancer patients
Assessment of fertility
Impact of cancer treatments
Fertility preservation options
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Gonadotoxicity of Chemotherapy
Ovarian Failure
(10-30%)
Temporary Amenorrhea
(60%)
S phase specific (Antimetabolites, Topoisomerase II inhibitors)
M phase specific (Antimicrotubule agents, Topoisomerase II Inh))
Alkylating Agents
Antitumor Antibiotics
× × ××
× × ×
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1. Blumenfeld Z. Best Pract Res Clin Obstet Gynaecol. 2012;26;379-390.
2. Levine J. Chpt 1. Oncofert Med Pract: Clin Issues and Impl. 2012;3-14.
Gonadotoxicity in Female
Overt ovarian insufficiency
Immediate Premature Ovarian Failure (prior to age 40)
Occult ovarian insufficiency
Regular cycles
Infertility
Early ovarian failure (prior to age 40)
Menopause = no period >12 months = Sterility
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0
0.5
1
1.5
2
2.5
3
3.5
4
Alkylating Alkylating-like Antibiotics Antimetabolites Plant alkaloids
Od
ds
rati
o
Damario et al, 2001
Ovarian Failure Risk by Cytotoxic Agent
Highest risk with alkylating agentsCyclophosphamide >4000mg/m2
Ifosfamide >16,000 mg/m2
Nitrosoureas (CCNU, BCNU) >300 mg/m2
Melphalan >40mg/m2
Busulphan >300 mg/m2
Procarbazine >4000g/m2
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Dose-Dependent Effect of Cyclophosphamide
Dose of Cyclophosphamide (mg/kg)
Num
ber
of PM
F
0
500
1000
1500
2000
2500
0 20 50 75 100
Meirow et al. (1999)
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Ovarian Failure in Childhood Cancer Survivor Studies (CCSS) Survivors vs Siblings
• Multicenter study
• 20,000 pediatric oncology patients treated between 1970 - 1986
• Survived at least 5 years
• Retrospective questionnaire-based study looking at incidence and severity of chronic health conditions in survivors compared to siblings
Green, J Clin Oncol, 27,14 2009
13-fold increase in
rate of POF
Green et al. JCO 2009;27(14):2374
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Partridge et al. Eur J Cancer, 2007 Jul, 43(11);1646-53
Impact of chemotherapy – Age of menopause
• International Breast Cancer Study Group
• n = 1407 premenopausal women randomized to no/low or high intensity chemotherapy
• Assessed at 5 and 10 yr
• OR for temporary amenorrhea 1.96 p<0.0001
• OR for premature menopause 2.03 p<0.0001
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Unique large study of adult survivors
Retrospective cohort study
Cancer diagnosis between 1981 and 2012 in Scotland
Aged 39 or less at diagnosis
n = 23,201 total
n = 10,271 not pregnant prior to diagnosis compared to matched control group from general population
www.pacificfertility.ca27
Anderson et al. Hum Reprod 2018;33(7)1281-1290
Impact of Cancer – Population-based analysis
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www.pacificfertility.ca28
Anderson et al. Hum Reprod 2018;33(7)1281-1290
Impact of Cancer – Population-based analysis
38% less likely to conceive (SIR 0.62 for pregnancy 95% CI: 0.60-0.63)
Consistent across all ages and cancer types
Marked reduction with breast, cervical, CNS and leukemia
No increased risk of:• SAB
• Stillbirth
• TAB
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Decanter et al. RBMO 2010;20(2): 280-5
Fertility after ABVD for Lymphoma
N = 30
Age 24 ± 4.7 years
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Dezellus et al. Eur J Cancer 2017;79:72-80
AMH after breast cancer chemotherapy
• n=250 breast cancer patients
• Aged 18-39 years
• Adjuvant/neoadjuvant chemotherapy
• Slow recovery AMH in 45%
• 92.4% rate amenorrhea
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Anderson et al. JCEM 2011;96(5):1336-1343
Anderson et al. Eur J Cancer 2013;49:3404-3411
Predictive Model for Ovarian Failure
98% sensitivity for
amenorrehea/ovarian failure
80% specificity
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Radiation Effects on the Ovary
• Causes widespread DNA damage via free radical production within field
Necrosis, apoptosis, DNA damage, mutations, carcinogenesis
• Ovaries can be damaged by direct or indirect radiation through abdominal, pelvic, TBI or craniospinal radiotherapy
• Ovarian follicle very sensitive to ionizing radiation
• Over 80% of women receiving pelvic radiation or BMT experience amenorrhea
• Effect on fertility varies according to:Dose received by ovaries
Number of follicles present at the time of treatment
Sanders et al. Blood, 1996; Wallace Clin Oncol 1989
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Green et al, J Clin Onc 2009, 27, 14, 2374
Radiation Effect on Ovary - CCSS
AOF = Acute Ovarian Failure
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Wallace et al. Int J Radiat Oncol Biol Phys 2005, 62(3) 738
Sterilizing dose of radiation to ovary
ESD: dose of fractionated
radiotherapy [Gy] at which
premature ovarian failure
occurs immediately after
treatment in 97.5% of
patients
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Wallace et al. Int J Radiat Oncol Biol Phys 2005, 62(3) 738
Predicting age of menopause after TBI
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Radiation Effect on the Uterus
Uterus affected by doses as low as 5 Gy
• Decreased uterine volume and uterine vasculature
• Lower likelihood pregnancy
• Increased risk pre-term labour, low birth weight and positional abnormalities for fetus
• Effects more pronounced with prepubertal exposure
1. Bath, Br J Obst Gynaecol 1999, 2. Green et al, J Clin Onc 2009;27(14):23743. Sudour et al. Int J Rad Oncol Biol Phys 2010;76(3), 867-873, 4. Laurence et al, F&S 2018;111(2):372
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Overview
Male cancer patient
Female cancer patients
Assessment of fertility
Impact of cancer treatments
Fertility preservation options
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Fertility Preservation Options
Optimize future natural fertility
Surveillance – ovarian reserve testing
Interval pregnancies
GnRH/LHRH agonist
Optimize future fertility treatment outcomes
Oocyte cryopreservation
Embryo cryopreservation
Ovarian tissue cryopreservation
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GnRH/LHRH agonists
Reduction in amenorrhea rates noted in patients using as adjuvant therapy
Hypogonadotropic hypoganadal state and ovarian quiesance1
Reduction of ovarian blood flow2
Direct effects via ovarian GnRH receptors3,4
1. Periti et al. Clin Pharmacokinet 2002;41:485-504
2. Reisch et al. Am J Obstet Gynecol 1994;170:1623-1627
3. Choi et al. J Clin Endocrinol Metab 2006;91:4562-4570
4. Imai et al. Obstet Invest 2007;63:102-106
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GnRH agonist for Ovarian Function Preservation Meta-analysis
Munhoz et al. JAMA Oncol 2016;2(1):65-73.
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A ssisted
R eproductive
T echnologies
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Embryo Cryopreservation
Requires ovarian stimulation
Most established fertility preservation technique for women with cancer
Requires sperm
Millions of babies born world-wide
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Canadian Assisted Reproductive Technologies Register Plus (CARTR Plus)
84.1%
eSET
77.1%
eSET
62.1%
eSET
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Oocyte Cryopreservation
Requires ovarian stimulation
No sperm required
Lower pregnancy compared to embryo cryopreservation
Fewer than 100,000 babies born of this technology (mostly DE)
1. Practice Committee of the American Society for Reproductive Medicine. Fertil Steril 2013;99:37-43.
2. Loren Aw, et al. J Clin Oncol. ;epub ahead of print May 28, 2013
.
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How many eggs should we freeze?
Goldman et al. Hum Reprod 2017;32:389-9N = 520
Achieving a 75% LBR
Age 34 – 10 eggs
Age 37 – 20 eggs
Age 42 – 61 eggs
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Concerns with IVF in Cancer Patients
Estrogen is carcinogenic
Conventional IVF raises estrogen levels 10-fold
VTE not a significant risk with ovarian stimulation but potentially is in hypercoagulable states like cancer
Ovarian Hyperstimulation Syndrome (OHSS)
No increase in breast cancer recurrence in short-term observational studies
1. Henderson et al. NEJM 1990;302:17-30
2. Prest SJ et al. FASEB. 2002;16:592-594
3. Love et al. JCO 2008;26:253
4. Omland AK et al. Hum Reprod. 2001;16:2587-2592
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141 “1”
GnRHa
Fertility Preservation Protocol for IVF
FSH
LH/hMG
E2
Letrozole 7.5 mg daily
RetrievalGnRHAntagonistGnRHaConsultation GnRH Antagonist
Natural Cycle I V F Cycle
P4
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www.pacificfertility.ca49
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Letrozole Dosing
0mg 5mg 7.5mg
A RETROSPECTIVE STUDY ON THE USE OF DOSE-DEPENDENT LETROZOLE AIMING TO
REDUCE CANCER GROWTH / RECURRENCE AND ADVERSE EVENTS IN PATIENTS UNDERGOING
OVARIAN STIMULATION
# %Breast 77 73.3Lymphoma 13 12.4 Cervical 5 4.8Colon 2 1.9Endometrial 2 1.9Ovarian 2 1.9Rectal 1 0.9Rhabdomyosarcoma 1 0.9Appendiceal 1 0.9Brain 1 0.9
Rahana et al. F&S 2019;111(4):e51-e52
# mature eggs NS
FSH dose NS
Cycle length NS
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Ovarian Tissue Freezing
No stimulation required
Can be done any time during the cycle
Potential to restore fertility and hormones
Requires surgery - laparoscopy
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Ovarian Transplantation - Outcomes
60+ pregnancies reported to date
One reported BRCA patient
Largest series in monozygotic twins (7 pregnancies) for POF not cancer and fresh transplants
No pregnancies to date from whole ovary transplant
Silber et al. Hum Reprod 2008;23(7):1531-1537
Ernst et al. Hum Reprod 2010 Advanced Pub
Sanchez-Serrano et al. Fertil Steril 2010;93(1)
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Pregnancy Outcomes in Cancer Survivors
No increased risks of congenital malformations, genetic diseases, malignant neoplasms in children born to cancer survivors remotefrom therapy1-3
Limited evidence of increased risk of pregnancy loss after chemotherapy
Radiotherapy associated with pregnancy complication
Safe interval between chemo and oocyte/embryo cryopreservation unknown:
Human pregnancy outcome for more recent exposures unknown, animal data suggest increased risk of SAB/birth defects5
1. Green DM et al., Am J Obstet Gynecol. 2002;187(4):1070-1080. 2. Green DM, et al. J Clin Oncol. 2003;21(4)716-721. 3. Winther JF et al. Am J Hum Genet. 2004;74(6):1282-1285. 4. De Mas P et al. Hum Reprod. 2001;16(6):1204-1208. 5. Meirow D et al, Hum Reprod. 2001;16:632-637.
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Take Home Message
• Patient should be made aware of fertility preservation options at diagnosis
• All chemotherapy appears to impact ovarian reserve
• Consider pre-chemo GnRHa downregulation
• Time permitting consider egg and embryo cryopreservation
• To achieve a 75% live birth rate with egg freezing:
• Age 34 – 10 eggs
• Age 37 – 20 eggs
• Age 42 – 61 eggs
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Take Home Message
• Ovarian tissue transplantation remains experimental
• Ovarian stimulation appears to be safe but aromatase inhibitorsshould be considered to reduce exposure to estrogen in womenwith breast cancer
• Pregnancy appears safe for cancer survivors following appropriatemedical assessment
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