Q:What is the meaning of Biological Clock?

     A:The biological clock ticks for men as well as women, doctors warn today, after research found that male fertility begins to decline when they reach their mid-30s.

     Q:Could you tell us more about the research?

     A:Yes.Researchers examined patient records of more than 12,000 couples treated at a fertility clinic in Paris, and separated out the influence of male and female ages on the couples’ chances of having a baby.

     They found that women whose partners were 35 or older had more miscarriages than those who were with younger men, regardless of their own age. The men’s ages also affected pregnancy rates, which were lower in the over-40s.

     Doctors have long known that a woman’s fertility drops sharply in her mid to late 30s, but the effect of age on male fertility is less well understood. Among women, miscarriage rates typically double to 40% between the ages of 20 and 40. Read the rest of this entry »