J
Johannes A. van Zyl
Researcher at Tygerberg Hospital
Publications - 2
Citations - 1767
Johannes A. van Zyl is an academic researcher from Tygerberg Hospital. The author has contributed to research in topics: Spearman's rank correlation coefficient & Embryo transfer. The author has an hindex of 2, co-authored 2 publications receiving 1717 citations.
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Sperm morphologic features as a prognostic factor in in vitro fertilization.
Thinus F. Kruger,Roelof Menkveld,F. S. H. Stander,Carl Lombard,Jacobus P. Van der Merwe,Johannes A. van Zyl,Karen Smith +6 more
TL;DR: In this article, the authors conducted a prospective study in women with bilateral tubal damage to determine whether there is a prognostic value in the percentage normal sperm morphologic features in a human in vitro fertilization (IVF) program.
Journal ArticleDOI
The evaluation of morphological characteristics of human spermatozoa according to stricter criteria
TL;DR: It can be concluded that the method developed in the laboratory and which resulted in the use of stricter criteria for the evaluation of sperm morphology is a practical, reliable and repeatable method and has a good prognostic value for the prediction of expected IVF fertilization, the hamster test and hemizona assay.