Evidence map›Paper›PMID 29264562›Full record

ArticleJournal of the Endocrine Society2017

Serum Testosterone Concentrations Remain Stable Between Injections in Patients Receiving Subcutaneous Testosterone.

Julie McFarland, Wendy Craig, Nigel J Clarke, Daniel I Spratt

2 registry-linked trialsOpen access · goldAbstract read
In one paragraph

Article in Journal of the Endocrine Society, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 17 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 2 pooled it
1.4field-weighted citation impact, top 18% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT06450405 phase4terminatednot on this mapstarted 2025, after this paper: background citation

Androgen Effects on the Reproductive Neuroendocrine Axis

TypeinterventionalSponsorUniversity of California, San DiegoRan2025 to 2025Enrolled2ConditionsTransgenderism, Reproductive IssuesArmsTestosterone Cypionate 50 MG/ML Injectable Solution
NCT07092527 phase4recruitingnot on this mapstarted 2025, after this paper: background citation

Androgen Effects on the Reproductive Neuroendocrine Axis, 2025 Version

TypeinterventionalSponsorUniversity of California, San DiegoRan2025 to 2028Enrolled80ConditionsTransgenderism, Reproductive IssuesArmsTestosterone Cypionate 50 milligrams per millileter (mg/mL) Injectable Solution
3 · Its place in the literature

Who cites it

17 citing papers in PubMed, 2 syntheses or guidelines pooled it, 29 citations in OpenAlex.

  1. A systematic review of transgender male rodent model methodology.Animal models and experimental medicine · 2025
    Pooled it
  2. Pooled it
  3. Risk of complications after total hip arthroplasty in patients on testosterone replacement therapy.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2026
    Article
  4. Article
  5. Review
  6. Review
  7. Article
  8. Article
  9. Review
  10. Article
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  12. Testosterone Replacement Therapy in Hypogonadal Men.Endocrinology and metabolism clinics of North America · 2022
    Review
  13. Article
  14. Article
  15. Medical transition for gender diverse patients.Current obstetrics and gynecology reports · 2020
    Article
  16. Article
  17. Gender affirming medical care of transgender youth.Current problems in pediatric and adolescent health care · 2019
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 3 institutions in 1 country.

Julie McFarlandDepartment of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Maine Medical Center, Portland, Maine 04102.
Wendy CraigMaine Medical Center Research Institute, Scarborough, Maine 04074.
Nigel J ClarkeQuest Diagnostics, Valencia, California 91355.
Daniel I SprattDepartment of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Maine Medical Center, Portland, Maine 04102.
Maine Medical Center · USMaine Medical Center Research Institute · USQuest Diagnostics (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeIntramuscular (IM) testosterone is the most common modality for testosterone therapy of both male hypogonadism and female-to-male (FTM) gender transition. However, IM injections can be painful and often are not self-administered by the patient. The objective of this study was to further characterize subcutaneous (SC) administration of testosterone as an effective and safe alternative to IM injections by evaluating the pharmacodynamics of serum total and free testosterone concentrations between weekly testosterone injections.

methodsEleven FTM transgender patients already receiving weekly SC testosterone cypionate with documented therapeutic levels prior to enrollment had free and total serum testosterone levels measured at eight different time points during a 1-week dosing interval.

resultsMean levels of total and free testosterone were stable and remained well within the normal range between injections. Overall mean ± standard deviation levels for the seven samples taken between injections were 627 ± 206 ng/dL (range, 205 to 1410) for total testosterone and 146 ± 51 pg/mL (range, 38 to 348) for free testosterone. No adverse effects were encountered.

conclusionsThe results of this study support use of SC testosterone to achieve therapeutic and stable serum testosterone levels for the purpose of gender transition. It is anticipated that these results can be extended to hypogonadal men. This route may be preferred over IM testosterone because it is relatively painless and easy to self-inject thus allowing for the convenience and economy of patient self-administration.

Indexed as

pharmacokineticssubcutaneous testosterone

Identifiers

PMID29264562
PMCPMC5686655
OpenAlexW2739031546

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.