Environmental causes such as infection (German measles or syphilis), head injury (or wound), encephalitis, meningitis, endocrine disorder or lack of secretion, disorder of food representation, poisoning and X-ray effect, blood of father and mother, Head after birth and collect cerebrospinal fluid brain cavities .. Etc.
Environmental causes are factors acquired at any stage of growth (prenatal, postnatal, or postpartum):
A) Before birth:
Infection of the pregnant mother - especially during the first month of pregnancy - with contagious diseases such as fever (such as measles or typhoid), or fetal blood disorders, due to incompatibility of the mother's blood type with father's blood type, mother's accident or X-ray exposure, Pregnant mothers should drink alcohol or take harmful side effects, especially during the first three months of pregnancy, or take them to smoke, with bad effects on the fetus whether the mother is a smoker or the smoker. Or exposure of pregnant women to chronic diseases such as diabetes, high blood pressure, or malnutrition of the pregnant mother or exposure to environmental hazards such as radioactive materials and chemical fumes. All of this may lead to maturation of cells with the fetus, resulting in congenital anomalies and mental disabilities such as Mongolian disability, and thus lack of mind.
B. During childbirth:
Complications of premature birth - premature birth, obstetric bleeding, or neonatal congestion due to the umbilical cord circumference around the baby's neck, or severe jaundice in the early hours after birth, such as cold or severe heat.
C - After birth:
(Especially severe head injury at an early age), or infections (especially inflammation of the brain and pelvis), convulsions and others, which lead to serious complications of brain cells or the child's exposure to poisoning and suffocation, or exposure in the early stages of severe and chronic malnutrition , Or exposure to road accidents and falls that lead to bleeding and erosion in the tissues of the central nervous system, or lack of environmental sensations, or injury to the senses of the basic mental development, such as hearing and vision, etc., leaving behind a mental disability vary degrees from one case to another.
Environmental causes are factors acquired at any stage of growth (prenatal, postnatal, or postpartum):
A) Before birth:
Infection of the pregnant mother - especially during the first month of pregnancy - with contagious diseases such as fever (such as measles or typhoid), or fetal blood disorders, due to incompatibility of the mother's blood type with father's blood type, mother's accident or X-ray exposure, Pregnant mothers should drink alcohol or take harmful side effects, especially during the first three months of pregnancy, or take them to smoke, with bad effects on the fetus whether the mother is a smoker or the smoker. Or exposure of pregnant women to chronic diseases such as diabetes, high blood pressure, or malnutrition of the pregnant mother or exposure to environmental hazards such as radioactive materials and chemical fumes. All of this may lead to maturation of cells with the fetus, resulting in congenital anomalies and mental disabilities such as Mongolian disability, and thus lack of mind.
B. During childbirth:
Complications of premature birth - premature birth, obstetric bleeding, or neonatal congestion due to the umbilical cord circumference around the baby's neck, or severe jaundice in the early hours after birth, such as cold or severe heat.
C - After birth:
(Especially severe head injury at an early age), or infections (especially inflammation of the brain and pelvis), convulsions and others, which lead to serious complications of brain cells or the child's exposure to poisoning and suffocation, or exposure in the early stages of severe and chronic malnutrition , Or exposure to road accidents and falls that lead to bleeding and erosion in the tissues of the central nervous system, or lack of environmental sensations, or injury to the senses of the basic mental development, such as hearing and vision, etc., leaving behind a mental disability vary degrees from one case to another.