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Science News for July 6, 2008


Couples with fertility problems where the man is over 35 have increased difficulty in conceiving

A recent study by Dr. Stéphanie Belloc found that men over 35 have a negative impact on pregnancy rates and increase miscarriage risks in women undergoing intrauterine inseminations (IUIs). This marks the first time a strong paternal effect has been shown, contradicting previous assumptions about the role of the father in fertility.