Danger of childbirth after 30

Late pregnancy may expose a baby to the risk of autism, which is one of the few genetic diseases affecting the whole brain.

Doctors refer to several reasons for this diseases. According to the latest data, late pregnancy, drug-based infertility treatment and environmental effects may cause autism, as well as other diseases affecting growth and psychic development.

The scientists from some European universities have studied the methods of transmission of this psychic disease. Professor Erik Parner from the Danish Arhus University jointly with Professor Simone Baron-Koen from Cambridge University examined nearly 10000 children suffering autism and Asperger’s syndrome.

The specialists looked through the data covering the last 30 years in respect of 1.3 million children who were born in Denmark. The autistic spectrum disorders, Asperger’s syndrome (personality disorder) and other growth diseases were diagnosed for 9556 of them. Nearly all parents of the diseased children were older than 35.

The above data caused the scientists to carry out a more close study of age effects on genetic diseases. It was found in the course of the analyses that the autism development risk for a fetus was much higher in those cases where both parents were older than 35. The parameters applied to them are 27 % higher than those applied to parents who are younger than 35. However, if mother is above 40, those chances are up to 65 %.

In most cases such data are associated with the body ageing process. At the same time, the environmental effects, diseases of parents and drug-based methods of infertility treatment are also deemed important. According to Professor Parner, the ageing gives rise to new mutations in male spermatozoa and female oocytes. Such mutations directly promote the development of child’s autism.