Вот пример, даже не надо уметь по-английски читать. ИМЕННО ВОЗРАСТ, как риск: http://www.cdadc.com/ds/down-syndrome-risk-factors.html"Mother's age 45 years, Down Syndrome risk factor is 1 pregnancy in 40"http://www.babycentre.co.uk/pregnancy/antenatalhealth/ageandpregnancy/"It is well-known that older women have a higher chance of having a baby with a genetic abnormality, such as Down's syndrome, Edward's syndrome or Patau's syndrome.""There is another small but serious risk to the babies of more mature mothers. More babies die in the uterus right at the end of pregnancy in mothers aged over 40.Figures for 2006 show that the rates of stillbirth were steady at around 5 to 6 babies per 1,000 births for women aged 20 to 39, but increased to just under 9 babies per 1,000 births for women aged 40 and over." http://www.dailymail.co.uk/news/article-93381/The-risks-older-mother.html"Women who give birth after the age of 35 are also at greater risk of having underweight babies. However after the age of 35, the risks do go up and babies are more likely to be born premature, and are at greater risk of being small."...and a lot more online... Больше продолжать разговор не буду, со стеной нефиг спорить