ArticleNigerian medical journal : journal of the Nigeria Medical Association
Are semen parameters worsening? Comparing semen parameters 10 years apart.
Article in Nigerian medical journal : journal of the Nigeria Medical Association. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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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.
The trial behind it
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Who cites it
4 citing papers in PubMed, 8 citations in OpenAlex.
- Semen quality of male partners of infertile couples attending a private specialist infertility hospital in Kumasi, Ghana: a retrospective descriptive analysis.The Pan African medical journal · 2025Article
- Decline of Sperm Quality over the Last Two Decades in the South of Europe: A Retrospective Study in Infertile Patients.Biology · 2022Article
- Is seminal quality worsening? A 20-year experience in Córdoba, Argentina.Journal of assisted reproduction and genetics · 2022Article
- Ibuprofen does not have an adverse impact on semen parameters.Journal of assisted reproduction and genetics · 2018Article
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundSemen parameters, especially sperm count and motility have been said to be diminishing over time with implications for fertility and infertility treatment.
objectiveThe objective of this study was to study semen parameters 10 years apart and describe any observed change.
designA retrospective study carried out at Nordica Fertility Centre, Lagos, Nigeria. Semen parameters of 100 consecutive men who sought fertility treatment on account of infertility in 2003 and semen parameters of 100 consecutive men who also sought fertility treatment at the center in 2013 on account of infertility were analyzed and compared. A paired
main outcome measuresThey are sperm count, motility, and mean progressive motility.
resultsThe mean sperm count in the 2003 group was 34.6 × 10
conclusionThere was a statistically significant 37% drop in mean sperm count and mean progressive motility worsened in the last decade. These may have far-reaching effects on infertility and its treatment.
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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.