Genetics of Male Infertility - Other conditions

Dr. Reeja Tharu
Medically Reviewed by The Medindia Medical Review Team  on Nov 04, 2016
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Genetics of Male Infertility - Other conditions

Kallmanís syndrome:

Hypogonadotropic hypogonadism, anosmia and male infertility are characteristics of Kallmanís syndrome. In most cases the mode of transmission is X linked recessive. However, autosomal dominant or recessive inheritance pattern have also been reported in some families. The gene responsible for the X linked form is on the Xp22.3 (KAL locus). Lack of hypothalamic secretion of gonadotrophin- releasing hormone (GnRH) is the important endocrinological defect. Thus these individuals have very low or undetectable levels of follicle stimulating hormone (FSH), leutinising hormone (LH) and testosterone.

Prader Willi Sydrome:

Hypothalamic deficiency of GnRH is the basic defect of this syndrome. In approximately 75% of the cases the cause is the deletion of region 15q11.13 on the chromosome inherited from the patientís father. In the remaining 25% of the cases no deletion was identified but both chromosome 15s were inherited from their mother (uniparental disomy).

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