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The fetal origins hypothesis (differentiated from the Developmental Origins of Health and Disease hypothesis, which emphasizes environmental conditions both before and immediately after birth) proposes that the period of gestation has significant impacts on the developmental health and wellbeing outcomes for an individual ranging from infancy to adulthood.
An endocrinology study by Garcia-Falgueras and Swaab postulated that "In humans, the main mechanism responsible of sexual identity and orientation involves a direct effect of testosterone on the developing brain." [1]: 25 Further, their study puts forward that intrauterine exposure to hormones is largely determinative. Sketching the argument ...
In a mouse model study, PGD has been attributed to various long-term risks, including a weight gain and memory decline; a proteomic analysis of adult mouse brains showed significant differences between the biopsied and the control groups, of which many are closely associated with neurodegenerative disorders like Alzheimer's and Down syndrome.
Studies testing for differences in behavior (i.e. temperament) tend to yield inconsistent results, [19] while those testing perception and cognition are typically more consistent. [5] Though supporting evidence exists, whether or not prenatal testosterone transfer occurs in humans remains debatable.
The presence of these biophysical variables implies absence of significant central nervous system hypoxemia/acidemia at the time of testing. By comparison, a compromised fetus typically exhibits loss of accelerations of the fetal heart rate (FHR), decreased body movement and breathing, hypotonia, and, less acutely, decreased amniotic fluid volume.
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Requires a maternal blood draw. Based on DNA of fetal origin circulating in the maternal blood. Testing can potentially identify fetal aneuploidy [55] (available in the United States, beginning 2011) and gender of a fetus as early as six weeks into a pregnancy. Fetal DNA ranges from about 2–10% of the total DNA in maternal blood.
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