Potential health benefits of continuous LNG-IUS combined with parenteral ERT for seamless menopausal transition and beyond--a commentary based on clinical experience

[Contraception for women after 40: CNGOF Contraception Guidelines]

INTRODUCTION

Choosing contraception for women over 40 can be sometimes difficult but it is crucial since fertility and pregnancy's risks still exist. It requires a thorough evaluation of the situation, in order to identify any vascular and metabolic risk factors, along with the uterine and mammary benign pathologies already diagnosed.

OBJECTIVE

The objective of this review was to elaborate some guidelines for clinical practice regarding contraception's prescription for women over 40.

METHODS

A systematic review of the French and English existing literature was conducted. Pubmed and the Cochrane library were used to identify studies about contraception for perimenopausal women. International guidelines published by scientific societies were also reviewed (RCOG, FSRH, ESHRE, ACOG, WHO, HAS).

RESULTS

No contraceptive methods are contraindicated on the sole basis of age alone. However, because age is a risk factor for vascular and metabolic diseases, combined hormonal contraception and DMPA should not be prescribed at first intention. Copper IUD and progestin-only contraceptives (pill, implant, intrauterine device) should primarily be considered, since they offer good efficacy with lower risks.

CONCLUSIONS

Contraception for women over 40 should not be put aside. Long acting reversible contraception and progestin-only pill have to be prescribed as first-ine. Contraception is no longer needed for women over 50 who use non-hormonal contraception, after a 12 month-amenorrhea. Patients treated with combined hormonal contraception must stop using it over 50. Measuring hormonal levels while using hormonal contraception is not recommended. An hormonal-contraception-free interval must be considered, while using barrier contraception method. If an ovarian activity persists, a non-hormonal contraception or progestin-only contraception (except for DMPA) should be (re-)established.

Femilis(®) 60 Levonorgestrel-Releasing Intrauterine System-A Review of 10 Years of Clinical Experience

OBJECTIVE

The aim of this study was to update the clinical experience with the Femilis® 60 levonorgestrel-releasing intrauterine system (LNG-IUS), now up to 10 years in parous and nulliparous women, particularly with regard to ease and safety of insertion, contraceptive performance, retention, acceptability, continuation of use, impact on menstrual blood loss (MBL), and duration of action.

STUDY DESIGN

Using the Femilis® 60 LNG-IUS releasing 20 µg of levonorgestrel/day, the following studies were conducted: an open, prospective noncomparative contraceptive study, an MBL study, a perimenopausal study, a study for the treatment of endometrial hyperplasia, and early cancer of the uterus, a residue study.

RESULTS

A total of 599 Femilis LNG-IUS were inserted in various clinical trials, the majority for contraceptive purposes. The total exposure in the first and second contraceptive studies, covering 558 parous and nulliparous women, was 32,717 woman-months. Femilis has high contraceptive effectiveness as only one pregnancy occurred. Expulsion of the LNG-IUS was rare with only two total and no partial expulsions (stem protruding through the cervical canal) occurred. Femilis was well tolerated, with continuation rates remaining high. Several MBL studies were conducted, totaling 80 heavy and normal menstrual bleeders, using the pictorial bleeding assessment chart method or the quantitative alkaline hematin technique. Virtually all women responded well with strongly reduced menstrual bleeding. Amenorrhea rates were high, up to 80% after three months, and ferritin levels simultaneously increased significantly. The Femilis LNG-IUS was tested in 104 symptomatic perimenopausal women for seamless transition to and through menopause, adding estrogen therapy when required. Patient tolerability appeared high as >80% requested a second and a third LNG-IUS. Twenty women presenting with nonatypical and atypical hyperplasia and one woman presenting with early endometrial carcinoma were treated with Femilis LNG-IUS. All histology specimens showed full regression, and patients remained in remission without signs of hyperplasia or cancer at yearly and ongoing follow-up examinations up to 10 years. Residual content of LNG was measured in 37 women having the Femilis LNG-IUS for up to 10 years. In 10 of the 102 women who had the Femilis 60 in situ for 10 years between 20% and 30% of the original 60 mg was recovered confirming the long duration of action of the Femilis 60 LNG-IUS.

CONCLUSION

These studies suggest that the Femilis 60 LNG-IUS releasing 20 µg of LNG/day is an effective, well-tolerated, and well-retained contraceptive both in parous and in nulliparous women. The design of the LNG-IUS, with flexible transverse arm(s) length of 28 mm, allows for a simplification of the insertion technique and training requirements facilitating the use by nonspecialist providers in either developed or developing countries. For nulliparous women, additional evaluation of devices with a 24 mm transverse arm(s), as it relates to tolerability, retention, and continuation of use, still needs to be undertaken.

Why perimenopausal women should consider to use a levonorgestrel intrauterine system

OBJECTIVE

The use of a levonorgestrel intrauterine system (LNG-IUS) is useful in preventing pregnancy and for the treatment of menstrual disturbances. A smooth or symptom-free transition to and through menopause is possible when LNG-IUS is combined with estrogen therapy. Unfortunately the majority of physicians are generally unaware of this usefulness combined hormonal therapy in the pre-, peri- and postmenopausal women.

DESIGN AND METHOD

Based on long-term clinical experience with LNG-IUS in the form of Femilis®, 104 women where followed from the premenopause through the menopausal transition into the postmenopause. These perimenopausal women received supplemental 17 β-estradiol by gel or patch, or orally as estradiol valerate. Patients received one or two separate Femilis insertions at 5 year intervals. Main outcome measures included acceptability and continued use of the combined regimen for the treatment of climacteric symptoms and for prevention of cardiovascular disease, osteoporosis and other adverse effects caused by estrogen deprivation.

RESULTS

The average age at insertion was 48 years (range 28-58) and the total duration of use was 137 months (range 80-161). The Femilis LNG-IUS was well tolerated as the number of removals for LNG-IUS-related reasons was low. The LNG-IUS was well retained in the uterine cavity as no expulsions were observed. Seven women were lost to follow-up. Eighty-six women (82%) opted for replacement of an LNG-IUS at expiry after 5 years and continued with the estrogen therapy.

CONCLUSION

Intrauterine progestogen delivery for endometrial suppression in combination with estrogen therapy in the symptomatic perimenopausal women is highly practical as it combines the benefits of prevention of endometrial proliferation and treatment of menorrhagia and hyperplasia, if present. In addition, the contraceptive effect of locally administered LNG is highly desirable as many perimenopausal women run considerable risk of unintended pregnancy. For these reasons, the author views this regimen as one of the most effective, safest and best accepted route resulting in high patient compliance. It is important to convey this message to general practitioners as well as women.

Unintended pregnancy risk and contraceptive use among women 45-50 years old: Massachusetts, 2006, 2008, and 2010

BACKGROUND

Little is known about unintended pregnancy risk and current contraceptive use among women ≥45 years old in the United States.

OBJECTIVES

The purpose of this study was to describe the prevalence of women ages 45-50 years old at risk for unintended pregnancy and their current contraceptive use, and to compare these findings to those of women in younger age groups.

STUDY DESIGN

We analyzed 2006, 2008, and 2010 Massachusetts Behavioral Risk Factor Surveillance System data, the only state in the United States to collect contraceptive data routinely from women >44 years old. Women 18-50 years old (n = 4930) were considered to be at risk for unintended pregnancy unless they reported current pregnancy, hysterectomy, not being sexually active in the past year, having a same-sex partner, or wanting to become pregnant. Among women who were considered to be at risk (n = 3605), we estimated the prevalence of current contraceptive use by age group. Among women who were considered to be at risk and who were 45-50 years old (n = 940), we examined characteristics that were associated with current method use. Analyses were conducted on weighted data using SAS-callable SUDAAN (RTI International, Research Triangle Park, NC).

RESULTS

Among women who were 45-50 years old, 77.6% were at risk for unintended pregnancy, which was similar to other age groups. As age increased, hormonal contraceptive use (shots, pills, patch, or ring) decreased, and permanent contraception (tubal ligation or vasectomy) increased as did non-use of contraception. Of women who were 45-50 years old and at risk for unintended pregnancy, 66.9% reported using some contraceptive method; permanent contraception was the leading method reported by 44.0% and contraceptive non-use was reported by 16.8%.

CONCLUSION

A substantial proportion of women who were 45-50 years old were considered to be at risk for unintended pregnancy. Permanent contraception was most commonly used by women in this age group. Compared with other age groups, more women who were 45-50 years old were not using any contraception. Population-based surveillance efforts are needed to follow trends among this age group and better meet their family planning needs. Although expanding surveillance systems to include women through 50 years old requires additional resources, fertility trends that show increasingly delayed childbearing, uncertain end of fecundity, and potential adverse consequences of unplanned pregnancy in older age may justify these expenditures.