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Dive into the research topics where Gabriele S. Merki-Feld is active.

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Featured researches published by Gabriele S. Merki-Feld.


Contraception | 2000

The incidence of actinomyces-like organisms in Papanicolaou-stained smears of copper- and levonorgestrel-releasing intrauterine devices.

Gabriele S. Merki-Feld; Elisabeth Lebeda; Brigitte Hogg; Paul J. Keller

Actinomyces-like organisms (ALOs) are a common finding in Papanicolaou-stained cervico-vaginal smears (PAP smears) of women using an intrauterine device (IUD). The incidence of ALOs positive PAP smears depends on the type of IUD. Pelvic actinomycosis is a severe disease that may require hysterectomy and salpingo-oophorectomy. In a retrospective study we compared the incidence of ALOs positive PAP smears in users of the new levonorgestrel-releasing intrauterine device (LNG-IUD) (n = 52) with the incidence in Multiload Copper IUD (ML375) users (n = 104). All IUDs had been inserted from 1996-1998. Women with a follow-up period of more than 9 months were included into the final analysis (LNG-IUD: n = 34; ML375: n = 65). The incidence of ALOs in LNG-IUD users (2.9%) was significantly lower than in ML375 users (20%). Clinical consequences of ALOs positive PAP smears are discussed controversially. The low incidence in the LNG-IUD users probably leads to less IUD-removals, reinsertions and less pelvic-inflammatory-diseases.


The European Journal of Contraception & Reproductive Health Care | 2007

Clinical experience with NuvaRing in daily practice in Switzerland: Cycle control and acceptability among women of all reproductive ages.

Gabriele S. Merki-Feld; Martin Hund

Objectives To assess clinical experience with NuvaRing® in daily practice in Switzerland, including a large subgroup of young women (aged ≤22 years). Methods Open, prospective, multicentre, observational clinical experience study to investigate cycle control, acceptability and usage of NuvaRing®. Results Altogether, 2642 women participated in the programme and were included in the analysis, of which 658 were aged ≤22 years (25% of the total group). A total of 744 women (28% of the total group) discontinued NuvaRing® use; the main reason was adverse events (11% of all users). In younger women, there was a shift from moderate (−18%) and heavy (−45%) bleeding to mild bleeding (+71%) and dysmenorrhoea decreased by 60%, despite previous hormonal contraception use by 83% of women. Most women found ring insertion and removal to be straightforward (>95%), and were satisfied with its use (85%), primarily for the rings once-a-month application (81%). Data were very similar for the total group. Cycle control and satisfaction were further improved with duration of treatment. Conclusions In daily practice, NuvaRing® improved cycle control and was highly acceptable to women, including young women. Switchers from other hormonal methods also showed improved cycle control and high satisfaction.


Contraception | 2001

Nonpalpable ultrasonographically not detectable Implanon rods can be localized by magnetic resonance imaging

Gabriele S. Merki-Feld; Caspar Brekenfeld; Björn Migge; Paul J. Keller

Recently, the contraceptive implant Implanon has been introduced in several European countries. In comparison to the six-capsule preparation Norplant, the removal of this single-rod system should be associated with less complications. However, the removal of nonpalpable Implanon rods can be difficult because the implant is not always visible with ultrasound. The aim of this study was to find a radiologic method for the localization of Implanon implants that are nonpalpable and can not be detected by ultrasound. X-ray, ultrasound, computed tomography, and magnetic resonance imaging (MRI) were investigated as methods to localize Implanon in a pig chest preparation and in a woman with a nonpalpable implant. The implant in the woman could be localized unequivocally only by MRI. We conclude that MRI is the best method for the unequivocal localization of nonpalpable, ultrasonographically not detectable Implanon rods. To avoid unnecessary scar tissue formation, it may be appropriate to defer surgery for the removal until definitive localization.


Clinical Endocrinology | 2007

Effects of the progestagen‐only contraceptive implant Implanon® on cardiovascular risk factors

Gabriele S. Merki-Feld; Bruno Imthurn; Burkhardt Seifert

Objective  Epidemiological studies on the cardiovascular risk of progestagen‐only contraceptives are rare. With the present study we aimed to investigate the effect of the low‐dose etonogestrel‐releasing contraceptive implant Implanon® on cardiovascular risk factors, including markers of inflammation.


British Journal of Obstetrics and Gynaecology | 2000

A prospective study on the effects of depot medroxyprogesterone acetate on trabecular and cortical bone after attainment of peak bone mass

Gabriele S. Merki-Feld; Maurus Neff; Paul J. Keller

Objective To study the annual change of bone mass in women aged 30–45 years being treated with depot medroxyprogesterone acetate (DMPA) in order to evaluate whether the bone mass depends on the duration of DMPA use or the oestradiol level.


Cephalalgia | 2013

Headache frequency and intensity in female migraineurs using desogestrel-only contraception: a retrospective pilot diary study.

Gabriele S. Merki-Feld; Bruno Imthurn; Ronald Langner; Peter S. Sándor; Andreas R. Gantenbein

Background Migraine seems to be substantially related to hormonal changes. However, migraine, but also the use of combined oral contraceptives (COC), is associated with an increased risk for vascular events. Therefore progestagen-only contraception is an important alternative to combined preparations. Clinical observations and one pilot study demonstrate that the use of desogestrel 75 µg may have a positive impact on migraine. Aim The aim of this retrospective analysis of prospectively collected headache diaries was to study the effect of desogestrel 75 µg on headache frequency, intensity and use of acute medication in premenopausal women with migraine in a clinical setting. Methods Patients’ charts were included from women who wanted to use desogestrel 75 µg as a contraceptive and had kept headache diaries over six months (three months pretreatment and three months during treatment). Out of 58 women, 38 women had completed headache diaries for this period. Incomplete diaries (n = 12), side effects (n = 5) and loss to follow-up (n = 3) were the reasons for the exclusion of 20 women. The three months (total of 90 days) before and after initiation of the progestin were compared. Results Days with migraine (5.2 vs. 3.7), days with all kind of headache (8.3 vs. 6.5) and days with use of any headache medication (5.7 vs. 3.5) were significantly reduced at follow-up after three months. In addition there was a reduction in headache intensity (p < 0.0001). The reduction in number of days with use of triptans was not significant (p < 0.14). Conclusion In the 38/58 migraineurs with complete diaries there was a statistically significant decrease in migraine days, headache intensity and medication use. Tension-type headache days decreased but were not significant. Our preliminary data are promising, but should be interpreted cautiously because they were obtained in a small population of women visiting a specialty hormone and migraine clinic. Randomised controlled trials need to be conducted to substantiate our results.


Contraception | 2003

A 2-year prospective study on the effects of depot medroxyprogesterone acetate on bone mass—response to estrogen and calcium therapy in individual users

Gabriele S. Merki-Feld; Maurus Neff; Paul J. Keller

The primary aim of this prospective 2-year follow-up study was to investigate the effect of depot medroxyprogesterone acetate (DMPA) on the maintenance of bone mass in women aged 30-45 years. The effects of estrogen or calcium substitution during the second year of follow-up was investigated in seven DMPA users with a high annual bone loss during the first year. The bone mass of 35 users of DMPA and 10 women without hormonal contraception was investigated using peripheral quantitative computed tomography. The baseline cortical and trabecular bone mass (TBM) and the annual change was not different in DMPA users and controls. Over 24 months we measured an increase in TBM of 0.6% and a decrease in cortical bone mass of 0.1% in exposed women. Some but not all of the DMPA users with a bone loss during the first year could be successfully treated with estradiol or calcium. In conclusion, we did not observe an accelerated bone loss in DMPA users aged 30-45 years.


Metabolism-clinical and Experimental | 2011

Serum concentrations of high–molecular weight adiponectin and their association with sex steroids in premenopausal women

Gabriele S. Merki-Feld; Bruno Imthurn; Marinella Rosselli; Katharina Spanaus

At present, the association between adiponectin and sex hormones in women is controversial. Recent studies suggest that it is high-molecular weight (HMW) adiponectin and the HMW to total adiponectin ratio rather than total adiponectin that are associated with antiatherogenic activities, insulin sensitivity, metabolic syndrome, and prediction of cardiovascular events. The present study aimed to investigate whether measuring HMW adiponectin and the HMW to total adiponectin ratio rather than total adiponectin might be more useful to detect an association between circulating female sex steroids and adipocytokines. In a clinical trial, we investigated the associations of total adiponectin, HMW adiponectin, and the HMW to adiponectin ratio with several androgens and estradiol in 36 healthy premenopausal women with regular cycles. No association between the investigated sex hormones and adiponectin was observed. The HMW adiponectin was negatively correlated with estradiol after adjustment for age and body mass index. The HMW to total adiponectin ratio was significantly negatively associated with testosterone, free testosterone, and androstenedione. The testosterone to estradiol ratio, as a parameter for the estrogen-androgen balance, was not associated with adiponectin or the HMW isoform. In conclusion, there is a negative association between estradiol and HMW adiponectin, and between testosterone, free testosterone, and androstenedione and the HMW to adiponectin ratio. Thus, one mechanism whereby female sex steroids may influence the cardiovascular risk of women could be alteration of the relationship between HMW and total adiponectin concentrations in plasma.


The European Journal of Contraception & Reproductive Health Care | 2013

Desogestrel-only contraception may reduce headache frequency and improve quality of life in women suffering from migraine

Gabriele S. Merki-Feld; Bruno Imthurn; Burkhardt Seifert; Laura L. Merki; Reto Agosti; Andreas R. Gantenbein

Abstract Objective To analyse the effects of a three-month course of progestogen-only contraception with desogestrel 75 μg on disability, headache frequency and headache intensity in migraineurs. Materials and methods Migraine disability headache questionnaires (MIDAS) were collected from 37 migraineurs during counselling, and at the end of three months treatment with desogestrel. Another ten women initiated but did not complete treatment. They are included in the overall evaluations of the effect of the regimen on migraine status. Results Desogestrel was associated with significant reductions in headache days and intensity (p < 0.001; p < 0.006), and a significant improvement in quality of life. Days missed at work and days missing leisure activities diminished (p < 0.001; p < 0.001). The MIDAS migraine disability score improved significantly (from 27.4 to 11.1 points) (p < 0.001). While 25 of the 37 women (68%) experienced a decrease of at least one grade, this level of benefit cannot be extrapolated to all initiators. When dropouts are considered, MIDAS grades decrease in 53% (25/47) of the cases. Conclusion The majority of migraineurs experienced a clinically significant reduction in headache frequency and improvement of quality of life with use of desogestrel. Prospective randomised controlled trials are needed to substantiate our results.


Journal of Obstetrics and Gynaecology | 2013

Effects of a combined oral contraceptive containing oestradiol valerate/dienogest on hormone withdrawal-associated symptoms: Results from the multicentre, randomised, double-blind, active-controlled HARMONY II study

G. Macìas; Gabriele S. Merki-Feld; S. Parke; U. Mellinger; Marco Serrani

The objective of this multicentre, randomised, double-blind study was to compare a combined oral contraceptive (COC) containing oestradiol valerate/dienogest (E2V/DNG) administered in a dynamic dosing regimen with a monophasic COC containing ethinyloestradiol/levonorgestrel (EE/LNG), with regard to their ability to reduce the frequency and intensity of headache and pelvic pain in women with hormone withdrawal-associated symptoms (HWAS). Women aged 18–50 years received E2V/DNG in an oestrogen step-down and progestin step-up regimen (26/2 regimen; n = 223) or EE 20 μg/LNG 100 μg (21/7 regimen; n = 218) over six cycles. Headache and pelvic pain were assessed using a visual analogue scale (VAS) during cycle days 22–28. Rescue medication use was also assessed. E2V/DNG was superior to EE/LNG with regard to reducing the frequency and intensity of headache and pelvic pain from baseline to cycle 6 (change from baseline in the average of the three highest VAS values [mean ± standard deviation]: 47.7 ± 29.4 vs 34.5 ± 25.7 mm, respectively; p < 0.0001). The use of rescue medication was also significantly reduced with E2V/DNG compared with EE/LNG (p < 0.05). E2V/DNG may be a good option for women who experience HWAS with traditional 21/7-day regimen COCs.

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