Background: Microdeletions of the long arm of the chromosome Y are the most common molecular genetic cause of severe infertility in men which affect three regions of AZFa, AZFb and AZFc (Azoospermia factor). These regions contain various genes involved in spermatogenesis. The effect of ethnicity on the patterns of Y chromosome microdeletions has not been extensively studied, particulary in Iran...

I T c a t m h 3 4 d t a p s m b a e d s s NTRODUCTION pproximately 15 percent of couples are unable to conceive fter one year of unprotected intercourse. A male factor is olely responsible in about 20 percent of infertile couples nd contributory in another 30–40 percent (1). Azoosperia, defined as complete absence of sperm from the ejacuate, is present in about 1 percent of all men (2) and in 1...

We analysed the CAG repeat length in exon 1 of the androgen receptor gene in 59 idiopathic Japanese infertile males with oligozoospermia; 36 fertile males were also analysed as controls. The number of CAG repeats in infertile males ranged from 14 to 32 (mean 21.2+/-4.2), whereas the number of CAG repeats in fertile males ranged from 16 to 31 (mean 21.4+/-3.5). Among infertile males, six possess...

IMPAIRMENT of dark adaptation was found frequently to occur in various endocrine disturbances of the genital function, and has been reported by us previously (Landau and Bromberg, 1950; Landau and Polishuk, 1948; Landau, Eckerling, and Polishuk, 1951; Landau and Bromberg, 1954). Disturbed scotopic vision was observed in the majority of patients suffering from pituitary or ovarian amenorrhea, in...