Cited by 142Reproductive Health and ContraceptionHypothalamic control of reproductive hormonesReproductive Biology and Fertility

Ovarian function during use of a levonorgestrel-releasing IUD

Barbosa, Ione, Bakos, Oddvar, Olsson, Sven-Eric, Odlind, Viveca, Johansson, Elof D.B.·1990·Contraception

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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Crossref · 10.1016/0010-7824(90)90092-a

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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 › Public Health, Environmental and Occupational Health › 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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