In general 1/3rd of the cases are due to male factor, 1/3rd are
due to female factor and the rest are unexplained. A thorough history taking and
comprehensive analysis of both the partners by blood tests, hormonal assays,
ultrasonogram and semen analysis of the male partner are the basic
requirements. Depending on necessity further investigations like genetic
karyotyping, or procedures like laparoscopy/hysteroscopy (Diagnostic/therapeutic)
may be advised.
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