long-acting contraceptive methods for women · 2016-06-27 · department of reproductive health and...
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Département santé et recherche génésiquesDepartment of reproductive health and research XX
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Long-acting
Contraceptive Methods
for WomenJohannes E. Schmidt
Department of Reproductive Health and Research (RHR)World Health Organization (WHO)Geneva, Switzerland
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Département santé et recherche génésiquesDepartment of reproductive health and research XX
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Today’s Presentation
Part I Contraceptive use worldwide
Part II Overview of long-acting contraceptives
Part III Current and future challenges
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Most contraceptive users worldwide rely on modern methods
Source: UN Population Division 2001. World Contraceptive Use.
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Département santé et recherche génésiquesDepartment of reproductive health and research XX
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Large proportion of the world’s couples are using contraception
Level of contraceptive use is higher in developed regions, highest in Europe and lowest in Africa.
Source: UN Population Division 2001. World Contraceptive Use.
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Département santé et recherche génésiquesDepartment of reproductive health and research XX
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Short-acting and reversible methods are more popular in developed regions.
Longer-acting and highly effective methods are more used in less developed regions
Source: UN Population Division 2001. World Contraceptive Use
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Part II: Long-acting methods
1. Injectable preparations
2. Implantable contraceptives
3. Intrauterine methods
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Département santé et recherche génésiquesDepartment of reproductive health and research XX
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4 long term contraceptives as effective as female sterilization
METHOD TRADE NAME USE TIME USERS (in million)
TCu380A IUD ParagardR 10-12 years 30-40
6 Silastic capsules implant NorplantR 7 years 8
LNG releasing IUS MirenaR 5 years 2
DMPA Depo ProveraR 3 months 12
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Département santé et recherche génésiquesDepartment of reproductive health and research XX
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Injectable contraceptives
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Injectable contraceptives (1)
• 1967: first registration of an injectable
• 1992: approved by the US FDA
• Currently registered in > 100 countries
• Used by >10 million women worldwide
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Injectable contraceptives (2)
1. Two-to-three monthly: progestogen-only
– NET-EN Examples: NoristeratR
– DMPA Examples: Depo-ProveraR, MegestronR
2. Once-a-month: combined progestogen-estrogen
- Examples: CyclophemR, CycloproveraR, MesigynaR
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Mechanism of action
• Mainly: ovulation inhibition
• Effects on morphology and function of
endometrium, Fallopian tubes, cervix
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Combined monthly injectablesTrade name Composition AvailabilityPerlutalTopasel
Dihydroxyprogesteroneacetophenide 150 mg +E2 enanthate 10 mg
Latin America,Spain
CyclofemLunelle
DMPA 25 mg +E2 cypionate 5 mg
22 c., Latin America,Indonesia, Thailand
MesigynaNorigynon
NET-EN 50 mg +E2 valerate 5 mg
Latin America, Turkey,7 African c., China
Chineseinjectable No1
17α-hydroxyprogesteronecaproate 250 mg +E2 valerate 5 mg
China
Mego-E Megestrol acetate 25 mg +17β E2 3.5 mg
China
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Combined monthly injectables: Typical pharmacokinetic profile
Adapted from: Fraser & Diczfalusy, 1980
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DMPA: Background
• Most commonly used injectable
• 150 mg / 1 ml aqueous solution
• Administered by deep i.m. injection
• Produces depot at site of injection
• Dissolves slowly with high initial serum levels
• Upon discontinuation delayed return of fertility
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Pharmacokinetic profiles of hormones administered by different routes anddifferent preparations
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DMPA: Contraceptive effectiveness
• Highly effective for at least 3 months
• Pearl Index 0.3 (pregnancies/ 100 women/ year)
• 3 pregnancies/ 1000 women/ year
• Provided injections are regularly spaced
• Some flexibility in timing of return visits
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DMPA
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DMPA: Menstrual bleeding disturbances
• Spotting: common during first months of use
• Heavy bleeding: during first months, rare
• Amenorrhea: frequent and increasing over time:
DMPA: 55% of users at 1 year, 80% at 5 years
• Highlights importance of good counseling
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DMPA: Non-menstrual adverse events:Discontinuation rates at 1 year (in %)
DMPA NET-EN CyclofemAbdominal discomfort 1.1 0.6 0.1Weight gain 2.1 1.6 1.5Anxiety/depression 0.7 0.9 0.3Fatigue 0.9 0.9 0.4Dizziness 1.2 1.6 1.2Headaches 2.3 2.0 1.2Decreased libido 0.9 0.6 -Hypertension 0.5 0.7 0.8
T O T A L 8.7 9.3 6.3Woman-months 20,550 10,361 10,969
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DMPA & bone metabolism
• Hypo-estrogenic effect on bone mineral density
• Adults: reversible upon discontinuation, no apparent long-term effect
• Adolescent girls: peak bone mass not yet attained, slow down of normal bone mass accumulation
• Evidence not conclusive: advantages outweigh concerns Scholes D et al. Contraception (2004) 69: 99 and: Epidemiology (2002) 13:581.
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Implantable contraceptives
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Which role do
implants
play in the worldwide method mix ?
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World Contraceptive Use 2001:Share of Implants in the method mix
IncludesImplants
Source: UN Population Division 2001. World Contraceptive Use.
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Implants: Numbers on Current Use
World No. of countries where licensed
------------------------------------------------------------------------------------------
Norplant 4 million 62
Jadelle 15,000 11
Implanon 1 million 25------------------------------------------------------------------------------------------
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Implants: Regulatory Approvals
1983 Finland first country to approve Norplant
1984 US FDA approves Norplant for 5 years
1996 US FDA first to approve Jadelle for 3 years
1997 Finland approves Jadelle for 3 years
1998 Indonesia first to approve Implanon
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Implant Contraceptives for WomenT rade N am e T ype
o f p rogestinN um bero f U n its
L ife span(in yea rs)
C urren t s ta tuso f app rova l
N orp lan t Levonorgestre l 6 capsu les 7 A pproved
Jade lle Levonorgestre l 2 rods 5 A pproved
Im p lanon E tonogestre l 1 rod 3 A pproved
N esto rone N esto rone 1 rod 2 U nderdeve lopm ent
E lcom etrine E lcom etrine 1 capsu le 0 .5 L icensed inB raz il
U n ip lan t N om egestro l ac . 1 capsu le 1 N ot ava ilab leon the m arke t
Source: Croxatto HB, et al. Contraception 2002; 65:15-9.
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Norplant
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Jadelle
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Norplant & Jadelle
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Norplant & Jadelle
Norplant (6 capsules) Jadelle (2 rods)
216 mg LNG 150 mg LNGSilastic medical
adhesiveSilastic tubing
Levonorgestrel
2.4 mm
34 m
m
36 mg 75 mg
2.4 mm
43 m
m
free crystals
crystalsin silicone
copolymer
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Implanon
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Implanon
Sterile disposable applicator
Obturator
Cannula with needle
Needle shield
Rod
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ImplanonSingle-rod implant with 68 mg etonogestrel (ENG, 3-ketodesogestrel)
68 mg ENGembedded inEVA copolymer
EVA copolymer rod covered by a thin EVA membrane
40 m
m
2.0 mm
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Insertion & Removal
• Minor surgery under local anaesthesia
• Inner aspect of the non-dominant upper arm
• Subdermal placement
• Implanon: surgery only for removal
• Norplant: difficult and time consuming removals
• Provider-dependent method
• Differences in mean insertion & removal times
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Insertion & Removal
Mean duration (in minutes)
Insertion Removal
Norplant 4.3 (0.8 - 18.0) 10.2 (1.3 - 50.0)Jadelle 2.0 4.8Implanon 1.1 (0.03 - 5.0) 2.6 (0.2 - 20.0)
Source: Mascarenhas L. Contraception 1998;58:79S.Sivin I et al. Human Reproduction 1998;13:3371
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Serum Levels of Levonorgestrel (LNG) One Week following insertion
Source: Croxatto HB et al. Contraception 2002; 65:15.
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Serum Levels of Levonorgestrel (LNG) One Year after insertion
Source: Croxatto HB et al. Contraception 2002; 65:15.
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Serum Levels of Levonorgestrel (LNG) First 3 years of use
Source: Croxatto HB et al. Contraception 2002; 65:15.
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Serum Levels of Levonorgestrel (LNG) 5 years of use
0
50
100
150
200
250
300
350
400
Year 1 Year 2 Year 3 Year 4 Year 5
NorplantJadelle
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Contraceptive Effectiveness:Norplant and Jadelle (1)
• Annual pregnancy ratesyear 5: < 1/100 Norplant & Jadelleyear 7: < 1/100 Norplantyear 7: 2.0/100 Jadelle
• Cumulative pregnancy ratesyear 5: 1.1/100 Norplant & Jadelleyear 7: 1.9/100 Norplant
Source: Sivin I, et al. Contraception 2000;61:187.
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Contraceptive Effectiveness:Norplant and Jadelle (2)
• Identical clinical performance through year 5
• Norplant: remains highly effective through year 7– equal to tubal ligation
• Jadelle: highly effective through year 5– remove at end of year 5
Sources: Sivin I, et al. Contraception 2000;61:187. Gu S, et al. Contraception 1995;52:99.
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Contraceptive Effectiveness:Implanon
• 13 studies with 1,700 women in 10 countries
• 4100 woman-years of observation
• Pregnancy rate over 3 years: zero
• Pregnancy rate over 4 years (2 studies): zero
• In 175 women with body weight >70 kg: zero
Source: Zheng et al. Contraception 1999;60:1. Affandi et al. Contraception 1999;59:167.
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Menstrual Bleeding Disturbances
Norplant and Jadelle- prolonged or irregular bleeding- spotting between periods- amenorrhoea
Implanon- prolonged or irregular bleeding - amenorrhoea
Source: Hickey M, d’Arcangues C. Contraception 2002;65:75.
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Non-menstrual Adverse EventsSymptom % users
• Headache 10-30• Weight gain 4-22• Acne 3-22• Dizziness 4-11• Mood changes 1-9• Hair loss 2-5
Discontinuation rates below 5%
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Return to Fertility
• Implant removal possible at any time
• Within days: progestins cleared from circulation
• Within 3 months: return of normal ovulation
• Within 1 year: high pregnancy rates
No adverse effect on post-removal fertility
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Requirements for implant provision
Training of providers
For counseling, insertion, removal, management
of side effects and of difficult removals
Adaptation of health services
Access to trained providers for insertion, follow
up, removal on demand, facilities, and supplies
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Title
WHO Study A15229:
Multi-centre randomized clinical trial of two implantable contraceptives for women:
Jadelle and Implanon.
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WHO Project A15229:Study Design & Sample Size
• Randomized clinical trial (RCT)
• Total sample size: 3,000 women
- 2,000 implant users
- 1,000 Copper-IUD users
• 10 study centres in 9 countries
• Semi-annual follow-up for up to 3 years
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Project A15229: Principal Investigators atInvestigator’s Meeting, Geneva, June 2002
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Intrauterine methods
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Intrauterine methods
1. Levonorgestrel-releasing intrauterine system
2. Copper-releasing intrauterine device
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Background: LNG-IUS (1)
• 1990 first regulatory approval (Finland)
• 2000 approved by US FDA
• Brand names: MirenaR , LevoNovaR
• Now registered in > 100 countries
• Number of current users > 2 million
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Background: LNG-IUS (2)
• T-shaped flexible plastic frame
• Hormone reservoir containing 52 mg LNG
• Daily LNG release rate: 20 µg
• Sustained release into the uterine cavity
• Contraceptive protection for at least 5 years
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Background: LNG-IUS (3)
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LNG-IUS: Mechanism of action (1)
High local LNG concentration
Suppresses endometrial morphology Thickens cervical mucus
Inhibits sperm motility & functionPrevents fertilisation
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LNG-IUS: Return of fertility
Upon discontinuation:
• Endometrial changes fully reversible
• Prompt return of fertility
• Planned pregnancy rates at 1 year: > 80%
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LNG-IUS: Contraceptive effectiveness
• Pregnancy rates (per 100 women): Annual 0.1 - 0.2Cumulative 0.5
• Single most effective method of reversible
contraception, closely followed by the TCu380A
• Nearly equal to female sterilization
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LNG-IUS: Menstrual bleeding pattern
Reduction in volume and duration of bleeding
• Lighter + shorter periods: starts at 3 - 6 months
• Spotting: subsides after 6 months
• Amenorrhea: 25% at 1 year, 60% at 10 years
• Potential non-contraceptive health benefits
Single most common reason for discontinuation
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Amenorrhea: the issue of acceptability
• Perceptions vary according to culture & religion
• Early surveys: amenorrhea unacceptable
• Recent survey: variable picture
• African women more likely to want
monthly bleeds
Glasier A et al: Contraception (2003) 67:1-3.
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Non-menstrual adverse events
• Headaches, nausea• Lower abdominal pain, back pain• Acne, hair loss• Breast tenderness• Mood swings • Weight gain
Prevalence low, symptoms subside after 3 - 4 months
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TCu380A Intrauterine device (IUD)
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TCu380A Intrauterine device (IUD)
• 1984 approved by US FDA for 4 years
• 1988 on US market ‘Paragard T380A’
• Registered in >70 countries
• T-shaped flexible plastic frame
• Highly effective in preventing pregnancy
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TCu380A IUD [vs LNG IUS]• 30-40 million current users [2 million]
• Efficacy period at least 10 years [5 years]
• Releases copper [levonorgestrel]
• Heavier & painful periods [lighter & shorter]
• Most cost-effective reversible contraceptive
• Most affordable ever developed
• Differences in clinical performance
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TCu380A versus LNG-IUS: Discontinuation rates per 100 women at 6 years of use
TCu 380A 20 µg LNG device
Total pregnancy 2.0 (0.5) 0.5 (0.2)
- Ectopic pregnancy 0.1 (0.1) -
- Intrauterine pregnancy 1.9 (0.4) 0.5 (0.2)
Expulsions 8.2 (0.8) 7.5(08)
Pelvic inflammatory disease 0.1 (0.1) 0.3 (0.1)
- Menstrual reasons 10.9 (0.9) 35.9 (1.4)
- Amenorrhoea 0.5 (0.3) 23.6 (1.3)
- Reduced bleeding 3. 1 (0.5) 10.9 (1.0)
- Increased bleeding 7.1 (0.7) 5.9 (0.7)
Total device-related removals 25.5 (1.1) 47.8 (1.3)
Loss to follow-up 7.9 (0.7) 5.8. (0.7)
Woman-years 7420.7 6381.6
Source of data: WHO Study 91908 Randomized trial TCu380A vs LNG-releasing IUD
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Long-acting methods: Common features
• Long-acting, convenient & reversible • Highly effective & generally safe• Efficacy independent of compliance
• Unpredictable bleeding disturbances• No dual protection• Provider dependency• Requires training of service provider • Requires adaptation of health services
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Part III: Contraception over the past 50 years ...
• Safer, more effective, more widely used • Broader choice• Contraceptive and non-contraceptive benefits• More and more women find some type of
hormonal contraceptive acceptable
However ...
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Family planning: the “unmet needs”
• Unmet need: 120 million
• Ultimate unmet need: 45 million
• Unsafe induced abortion: 20 million
• Maternal deaths from unsafe abortion: 78,000
• Contribution to maternal mortality: 15%
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Progress towards reducing the unmet needs requires ...
• Improved access to good quality services
• Strengthened capacity of health systems
• Improved education & counseling of users
• New & improved methods
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Leads in contraceptive R & D
1- Long-acting methods under user’s controlVaginal ring, transdermal patch, self-administered injectable (UnijectR)
2- Dual protection methodsMicrobicides, female condom
3- Emergency post-coital methodsYuzpe regimen, levonorgestrel, anti-progestins (mifepristone)
4- Male methodsHormonal methods, improved (non-surgical) vasectomy
5- Methods with less side effectsImmunocontraceptives (hCG), frameless IUDs
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… Concluding remarksReducing the unmet needs
Requires an integrated approach of:• Contraceptive research & development• Improvement of the status of women• Good quality provider services• Adaptation of health services
Recommended reading: 1) Bongaarts J, Johansson E. 2000, No 1412) d’Arcangues C. Reproductive BioMedicine Online2001;3:34.
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