A French team of fertility experts discovered that maternal genetic imprinting errors can occur during egg follicle development in mice. The research found that methylation patterns, essential for normal development, were disrupted at the earliest stages of in-vitro cultivation.
The European Society of Human Reproduction and Embryology (ESHRE) has reaffirmed its ban on human reproductive cloning due to significant practical and ethical risks. The organization believes that the generation of clones could infringe upon human dignity, increase genetic determinism, and restrict autonomy.
The study found that single embryo transfer (SET) does not reduce the chances of having a baby, with similar cumulative live birth rates to dual transfers when previously frozen embryos are included. SET also carried fewer risks to mothers and fetuses, with only three sets of twins out of 107 women.
Researchers discovered that a single life-extending mutation affects multiple genes, including those controlling cellular stress response and metabolic processes. The study reveals the intricate connections between genetic pathways and their impact on lifespan.
Researchers found semen volume increases with abstinence, but sperm morphology deteriorates over time. Abstaining for up to two days may be sufficient for some men undergoing fertility treatment.