Cited by 272Reproductive Health and ContraceptionSperm and Testicular FunctionHypothalamic control of reproductive hormones

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Rate, extent, and modifiers of spermatogenic recovery after hormonal male contraception: an integrated analysis

Liu, Peter Y, Swerdloff, Ronald S, Christenson, Peter D, Handelsman, David J, Wang, Christina·2006·The Lancet

DOI 10.1016/s0140-6736(06)68614-5

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Abstract

Background Hormonal methods for safe, reliable, and reversible contraception based on the suppression of spermatogenesis could soon become available. We have investigated the rate, extent, and predictors of reversibility of hormonal male contraception.Methods We undertook an integrated multivariate time-to-event analysis of data from individual participants in 30 studies published in 1990-2005, in which sperm output was monitored every month until recovery. The primary outcome was the time for the sperm concentration to recover to a threshold of 20 million per mL, an indicator of fertility. We undertook univariate and multivariate analyses, using Kaplan-Meier and Cox's methods.Findings 1549 healthy eugonadal men who were white (n=965), Asian (almost all Chinese men; n=535), or of other origins (n=49) and aged 18-51 years underwent 1283.5 man-years of treatment and 705 man-years of post-treatment recovery. These data represented about 90% of all published data from individuals using androgen or androgen-progestagen regimens. The median times for sperm to recover to thresholds of 20, 10, and 3 million per mL were 3.4 months (95% CI 3.2-3.5), 3.0 months (2.9-3.1), and 2.5 months (2.4-2.7), respectively. Multivariate Cox's analysis showed higher rates of recovery with older age, Asian origin, shorter treatment duration, shorter-acting testosterone preparations, higher sperm concentrations at baseline, faster suppression of spermatogenesis, and lower blood concentrations of luteinising hormone at baseline. The typical probability of recovery to 20 million per mL was 67% (61-72) within 6 months, 90% (85-93) within 12 months, 96% (92-98) within 16 months, and 100% within 24 months.Interpretation Hormonal male contraceptive regimens show full reversibility within a predictable time course. Various covariables affect the rate but not the extent of recovery, although their effect sizes are minor. These data are crucial for the further safe and practical development of such regimens.

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Authors: Liu, P. Y., Swerdloff, R. S., Christenson, P. D., Handelsman, D. J., & Wang, C.
Affiliations: The University of Sydney (AU)
The Lundquist Institute (US)
Corresponding author: Liu, Peter Y
ORCID: Liu, Peter Y
Swerdloff, Ronald S
Handelsman, David J
Wang, Christina
Venue: The Lancet
Publisher: Elsevier BV
Published: 2006-04
Volume: 367
Issue: 9520
Pages: 1412-1420
ISSN: 0099-5355 (ISSN-L)
0140-6736
DOI: 10.1016/s0140-6736(06)68614-5
OpenAlex: W2144125198
Cited by: 272
References: 79
Citations by year: 2026: 13 · 2025: 8 · 2024: 24 · 2023: 24 · 2022: 20 · 2021: 15 · 2020: 15 · 2019: 17 · 2018: 14 · 2017: 19 · 2016: 15 · 2015: 11 · 2014: 8 · 2013: 10 · 2012: 14
FWCI: 8.62
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: The Lancet (publishedVersion)
PubMed (publishedVersion)
Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
Research Explorer (The University of Manchester) (submittedVersion)
Funders: Institut National de la Santé et de la Recherche Médicale
National Institutes of Health
National Health and Medical Research Council
National Medical Research Council
National Center for Research Resources (M01RR000425, RR M01 00425)
Topics: Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Health and Contraception
Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords: androgen deprivation therapy, testosterone, sperm concentration, luteinizing hormone, predictors of recovery, time to recovery
MeSH terms: Adult, Androgen Antagonists, Androgens, Clinical Trials as Topic, Contraception, Humans, Male, Middle Aged, Prospective Studies, Sperm Count, Spermatogenesis, Spermatogenesis-Blocking Agents, Testosterone, Time Factors, Multicenter Studies as Topic

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Rate, extent, and modifiers of spermatogenic recovery after hormonal male contraception: an integrated analysis

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