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Fertility Treatment Not Tied to Twin Birth Defects

Twins born after fertility treatments may be susceptible to different — and fewer — birth defects than other twins, new research suggests. The study confirms that twins have a higher risk of birth defects than singletons, but it questions the notion that fertility treatments contribute to those abnormalities.

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Study Indicates that More Than Half of the Population Carries Mutated Genes

56% of the population are carriers of genetic mutations susceptible of causing major hereditary diseases, according to a study published in the journal Human Mutation. The research, which has been awarded by the Spanish Fertility Society, proposes to offer, systematically, genetic screening tests for recessive mutations in reproductive medicine units.

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Human-embryo Editing Now Covered by Stem-cell Guidelines

The international society that represents stem-cell scientists has updated its research guidelines in the wake of dramatic progress in several fields — in particular in research that involves the manipulation of human embryos. The authors hope that the updated guidelines will allay various ethical concerns, and avoid the need for strict government regulations that could impede the progress of science.

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Control of Fertility: New Player Identified

Individual small RNAs are responsible for controlling the expression of gonadoliberin or GnRH (Gonadotropin-Releasing Hormone), a neurohormone that controls sexual maturation, the appearance of puberty, and fertility in adults, new research shows. The involvement of microRNAs, transcribed from DNA, occurs around birth, and marks a key step in postnatal development.

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Early Fetal Abnormalities May Correct Themselves in Time

Abnormal cells in the early embryo may not necessarily mean that a baby will be born with a birth defect such as Down’s syndrome. Research published in Nature Communications suggests that abnormal cells can be eliminated and replaced by healthy cells, potentially leading to complete repair.