The importance of employing stringent methods to recruit fertile male controls
| Autor: | B.C. Dunphy, E. J. Thomas, Christopher L.R. Barratt, Richard Kay, Ian D. Cooke, L. M. Neal |
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| Rok vydání: | 2009 |
| Předmět: |
Adult
Male Quality Control Infertility medicine.medical_specialty Urology media_common.quotation_subject Fertility Semen Biology World Health Organization Endocrinology Pregnancy medicine Humans Reproductive history Sperm motility media_common Gynecology Sperm Count Obstetrics General Medicine medicine.disease Spermatozoa Stringent factor Sperm Motility Gestation Female |
| Zdroj: | Andrologia. 23:35-39 |
| ISSN: | 1439-0272 0303-4569 |
| DOI: | 10.1111/j.1439-0272.1991.tb02490.x |
| Popis: | Summary. Two methods of recruiting fertile male controls were evaluated and compared. The first group was recruited from the partners of women attending an antenatal clinic without obtaining details of their reproductive history. The second group was recruited after obtaining a detailed reproductive history from the couple and employing stringent entry criteria. Entry criteria for the second group included a length of exposure to the risk of pregnancy of not more than 12 months and no previous episode of involuntary infertility for either partner. There were significant differences between the distributions of semen parameters obtained from the two groups, indicating that the selection criteria for “fertile” men significantly influence results obtained and therefore that it is important to employ stringent criteria for the recruitment of fertile male controls. The group which was recruited by stringent criteria (mean length of exposure to the risk of pregnancy of 3 months) was characterised by a significantly higher median concentration of spermatozoa which exhibited slow linear or nonlinear motility. This confirms the findings of a previous study which suggested that slow linear or nonlinear motility are superior forms of spermatozoal motion. |
| Databáze: | OpenAIRE |
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