American scientists have found that embryos derived from sperm of older men develop slower than embryos arising from gametes young men. Research presented at the annual conference of the American society of reproductive medicine (San Antonio, TX), drew the attention of the Daily Mail.
In average embryos that developed from sperm of men older than 50 years, developing by 35 percent slower than the germ received from the germ cells of men under the age of 35 years.
In particular, such a late embryo reaches the blastocyst stage, after which the attachment of the embryo to the uterine wall. The average attainment of the blastocyst stage embryos from adult men is 4.3 percent more time than in embryos from young men.
To such conclusions the authors came analyzing the video, which depicted the development of the embryo 3532 taken from 527 heterosexual couples.
The publication cites examples of other studies presented at the conference and on the impact of manhood on the quality of his sperm. One of them says that in the germ cells of the adult men accumulated too many mutations, and in the other it is reported that the sperm of older men contain an excess of aneuploid sex cells (they have violated the normal number of chromosomes).
“Older people and their partners should think about the risks of poor pregnancy outcomes and potential problems of nervous system development in offspring,” — said Vice-President of the American society for reproductive medicine Peter Schlegel.