Male-factor infertility accounts for 35% of infertile unions. Its main cause is primary seminiferous tubule failure, which is reflected in poor semen quality or azoospermia (e.g. in Klinefelter's ...
Willie F.* grew up thinking he wouldn't be able to father biological children: he has a chromosomal abnormality that causes infertility. Still, when he and his wife were ready to become parents in ...