Blastocysts more commonly have a normal karyotype than cleavage-stage embryos do. Moreover, blastocysts have also made a metabolic transition from catabolism and recycling of the oocyte's reserves and resources, processes that fuel the first 3 days of cleavage. Although not all blastocysts are karyotypically equal, it is still to be determined to what extent a mosaic karyotype might be a normal...

BACKGROUND Embryo biopsy is a new invasive procedure applied in ART for diagnostic purposes in preimplantation genetic diagnosis (PGD) or to increase pregnancy rate in preimplantation genetic screening (PGS). The objective of this study is to assess mental and psychomotor developmental outcomes in 2-year-old children born after PGD/PGS, intracytoplasmic sperm injection (ICSI) and natural concep...

The past hundred years have given birth to arguably the most profound changes in society, medicine, and technology the world has ever witnessed. Genetics is one such field that has enjoyed a meteoric rise during this time. Progressing from Mendelian genetics to the discovery of DNA to the ability to sequence the human genome, perhaps no other discipline holds more promise to affect future chang...

Among the many educational materials produced by the European Society of Human Reproduction and Embryology (ESHRE) are guidelines. ESHRE guidelines may be developed for many reasons but their intent is always to promote best quality practices in reproductive medicine. In an era in which preimplantation genetic diagnosis (PGD) has become a reality, we must strive to maintain its efficacy and cre...

Since genetic testing techniques are available, they never stopped being improved over the years. Theses techniques bring a greatest knowledge of the human genome. Thus, geneticists are now capable of diagnosis of genetic conditions, identification of at-risk patients for cancer.... Although genetic testing has been a major revolution in the practice of medicine, it goes without saying that it ...