The male is the causative factor in about 50% of childless marriages (Dubin and Amelar 1971). The reasons for male infertility or subfertility are, in decreasing order, varicoceles, testicular failure, insufficient semen volume, endocrine and sexual problems, vasal...
CITATION STYLE
Wagenknecht, L. V. (1982). Obstruction in the Male Reproductive Tract. In Treatment of Male Infertility (pp. 221–248). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-642-68223-0_17
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