The development of safe and efficacious methods for prenatal diagnosis has been the subject of intense research in the past decade. This has, in part, been spurred by a dramatic shift in population demographics in developed nations, typified by a significant increase in maternal age (>30 years) and a concomitant reduction in parity, with most couples opting only for one child. Because an increased maternal age is associated with an elevated risk for bearing a fetus with a chromosomal anomaly, this demographic change has led to an increased need for prenatal diagnoses, which can currently only be reliably performed using invasive practices, such as amniocentesis or chorionic villus sampling. As these procedures are associated with a significant risk for fetal loss (on the order of 0.1%), the need for safe alternatives has been voiced, as many couples were reluctant to expose their long sought-after unborn child to this risk.

Getting Started With Dumbbells

Getting Started With Dumbbells

The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.

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