Abstract
McIlree et al. (1966) carried out meiotic studies in 50 infertile or sterile males, and described the presence ofmultivalents in two oligozoospermic patients with normal unbanded somatic karyotypes. We have observed the presence of multivalents in one from 18 and six from 26 metaphase I figures in testicular biopsies from two sterile males (one with azoospermia, the other with oligoasthenozoospermia) with normal 46,XY somatic karyotypes (G and Q bands) (Figs. 1 and 2). The patients had not been irradiated or medically treated. We would be very interested to hear of similar observations from other authors.
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