The hormones that are secreted during pregnancy increase the instinctive tendency to defend the descendants from all kinds of dangers.
Certain hormones secreted during pregnancy, as prolactin or the placental lactogenos – produced by the placenta-exert an effect on the brain of the mother, by inducing changes in their mental function and its conduct and favoring the maternal instinct, which translates into aggressiveness and motivation to care for and protect the young, as it has revealed a study that conducted the Group’s functional neuroanatomy (NeuroFun) of the Faculty of Health Sciences of Universitat Jaume I de Castellón (UIJ).
Most of the centers of the brain sociosexual are hiperestimulados by the placental during pregnancy lactogenos, so when born the offspring already instinctive tendency to protect them has increased
In the study, whose results have been published in the journal Brain Structure and Function, the sensitive areas of the brain is mapped to the lactogenos placental females of mouse along all the reproductive cycle, with special attention to the stages of pregnancy and lactation, employing a technique that allows to detect cells that respond to hormones such as prolactin and prolactin.
The researchers checked so the majority of sociosexual brain centers are hiperestimulados by the placental during pregnancy lactogenos, so when born the offspring of mother brain function has already modified, and the instinctive tendency to defend the descendants of all kinds of hazards, as well as the motivation to strengthen the bond with the young has increased breastfeed them, clean and wrap them.
Ferran Martínez-García, Professor of cell biology who led the research team, explained that maternal aggression is not, as previously thought, a consequence of the interaction between the mother and the offspring, but is due to the action of hormones on the brain before birth.
This expert added that a “hormonal storm” which is triggered during pregnancy can also alter mood and increase the risk of depressive disorders before and after childbirth, and such studies may help to understand the role that hormones play in emotional responses during pregnancy, childbirth and breastfeeding.