Science has shown that stress affects brain development in newborns of different genders

Cortisol is secreted by epinephrine and is a "barometer" of body stress.
of cortisol secretion will directly affect the body's immune system, nervous system, endocrine system and other dysfunction, such as the performance of hair, will cause hair loss.
pregnant women as a special group, there have been studies have shown that the pressure of pregnancy affects the development of the newborn amygdala.
the amygdala, the brain's control and learning organization, plays an important role in generating emotions, recognizing them, and regulating them, and autism appears to be associated with the enlarged amygdala.
how the mood of pregnant women affects the development of the newborn amygdala has not been specifically studied.
November 24, 2020, the journal eLife published a research team at the MRC Reproductive Health Centre at the University of Edinburgh, UK, entitled "Maternal cortisol isassociated neo with amynatal amygdala microstructure and connectivity" For the first time, objective cortisol hormone measurements were used in the mother to explore the link to brain development in infants and to demonstrate that cortisol concentrations and amygdala development in pregnant women have different effects depending on the sex of the baby.
The experiment analyzed data from 78 pairs of mothers and children, taking hair to measure cortisol concentration (HCC) every 3.5 days after child-rearing, and performing magnetic resonance imaging (MRI non-invasive brain scans) while the baby was sleeping to measure structural changes in the amygdala, including the connection between anisotrological fractions (FA), neurodegenerative dispersion (ODI) and the amygdala and nucleus.
results found that there is a clear interaction between the mother's cortisol level and the baby's sex, the HCC of pregnant women and the girl's left amygdala FA positive correlation, negative correlation with the left amygdala ODI, that is, pregnant women secrete too high cortisol, will cause the female newborn neurodegeneration direction dispersion.
while HCC in pregnant women is negatively cored with the left amygdala FA in boys, positively cored with left amygdala ODI, i.e. pregnant women secrete too much cortisol, which can lead to a decrease in the number of neuron axons in male newborns.
In the results of the connection between the amygdala and the nucleal shell, the HCC of pregnant women was positively cored with the connection between the amygdala-nuclear shell of a girl and negatively cored with the boy, i.e. excessive cortisol secretion affected the connection between the amygdala and the nucleal shell of a female newborn.
can be seen that the mother secreted too much cortisol will affect the male newborn amygdala microstructure changes, will affect the female newborn amygdala connectivity changes.
further explains why mothers are more stressed during pregnancy and children are more likely to experience emotional problems after birth.
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