The DOI matches its Crossref record; 34 of the 37 references it cites were found in a registry or an index.
Ovarian function during use of a levonorgestrel-releasing IUD
Abstract
Ovarian function was studied for two complete menstrual cycles in 9 regularly menstruating women and for 8 weeks in three amenorrhoeic women who had used levonorgestrel-releasing IUDs (LNG-IUD) for more than four years. Nine patients using copper IUDs (Nova-T) were studied for two complete menstrual cycles as controls. According to progesterone levels, 15/17 cycles in women using LNG-IUDs were ovulatory, whereas only 8/17 cycles showed normal follicular growth and rupture as judged by ultrasound. In ovulatory cycles, the peak progesterone levels were lower than in the controls. The preovulatory estradiol and LH peak levels were also lower than in control subjects. SHBG levels were lower in LNG-IUD users than in copper IUD users. It is concluded that, although the dose of levonorgestrel released from the IUD is very low, it probably exerts an effect on the gonadotrophin secretion, which disturbs follicular development in many of the women studied, which in addition to the local effect on the endometrium, contributes to its high contraceptive efficacy.
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“In fact, anovulatory rates varies from 70-85% in the first months of use to 15-40% after that [75].”
From Oral and depot progestin therapy for endometriosis: towards a personalized medicine (2017) · cites this paper as [75]
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Metadata
- Authors
- Barbosa, I., Bakos, O., Olsson, S.-E., Odlind, V., & Johansson, E. D. B.
- Affiliations
- Uppsala University (SE)
- Venue
- Contraception
- Publisher
- Elsevier BV
- Published
- 1990-07
- Volume
- 42
- Issue
- 1
- Pages
- 51-66
- ISSN
- 0010-7824 (ISSN-L)
- OpenAlex
- W2138771402
- Cited by
- 142
- References
- 37
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 2 · 2023: 3 · 2022: 7 · 2021: 1 · 2020: 2 · 2019: 1 · 2017: 5 · 2016: 5 · 2015: 2 · 2014: 2 · 2013: 2 · 2012: 3
- FWCI
- 4.84
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Contraception (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Health and Contraception
- Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
- Health Sciences › Medicine › Reproductive Medicine › Reproductive Biology and Fertility
- Keywords
- levonorgestrel-releasing IUD, ovarian function, ovulation, progesterone, folliculogenesis, gonadotropin secretion, luteinizing hormone, estradiol, sex hormone-binding globulin, copper intrauterine device, amenorrhea, contraceptive efficacy
- MeSH terms
- Adult, Cervix Mucus, Contraceptive Agents, Female, Endometrium, Estradiol, Female, Follicular Cyst, Gonadotropins, Humans, Intrauterine Devices, Copper, Intrauterine Devices, Medicated, Luteinizing Hormone, Male, Norgestrel, Ovary, Progesterone, Sex Hormone-Binding Globulin, Sperm-Ovum Interactions, Ultrasonography, Levonorgestrel
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