Named age beyond which it is dangerous to have children
MOSCOW, 1 Nov — RIA Novosti. American scientists have found that embryos that were obtained from the sperm of older men develop slower than embryos that have emerged from cells of young partners. Reported by the Daily Mail, citing a report presented at the conference of the American society for reproductive medicine.
Researchers from the research center of Boston has determined that the embryos produced using the semen of men over age 50 develop by 35% more slowly than embryos from people under 35. The germ received from the older men, 4.3% later reaches the blastocyst stage, after which the attachment of the embryo to the uterine wall. To such conclusions the authors came analyzing the video, which depicted the development of the embryo 3532 taken from 527 heterosexual couples.
Scientists from the medical center Weill Cornell Medicine found that older men’s sperm accumulates mutations as well as shows a tendency to aneuploidy — abnormal number of chromosomes in the cell. This increases the probability of conception of an unhealthy embryo. This is the conclusion the doctors came after examination of the seven age groups from 25 to 55 years.
According to the researchers, both defect most frequently encountered in the examined men over the age of 55 years. In addition, the rate of fertilization decreased from 87.7% of that in the youngest age group to 46% in the oldest group.
Previously, scientists from medical school at Boston University have determined the average age when people considered the most beautiful. According to them, now it is 38.9 years. In 1990, he was 33.2 years.