Harmful Substances/respirtary infe.

Enviornmental influences like smoking,drinking and drugs

Smoking tobacco or secondhand smoke

This is caused by the mother smoking or by the mother inhaling the smoke of others.
This can cause miscarriage, premature birth and smaller babies.
This can lead to Sudden Infant Death Syndrome this a cause of death cannot be found.
Babies who breath other peoples smoke are more likely to get ear infections and more frequent asthma attacks .
Detections are low birth weight,undeveloped bodies and lungs and brain function

Alcohol

Alcohol can cause Fetal Alcohol Syndrome.
Fetal Alcohol Syndrome is caused by drinking too much and there is really no treatment.
20% of infants die,facial deformities,delayed physical growth,heart defects,hyperactivity,mental retardation or disabilities,poor coordination,difficulty controlling behavior.
Detections is facial structure of the child

Drugs

Over the counter drugs,drug addictions,long term learning and behavior problems,risk of miscarriage,congenital heart problems.
When doing drugs it depends on what you are doing to determined what or how the baby will act.
The baby will become addicted to the drug also and have to stay longer at the hospital. Heart attacks, respiratory failure, strokes, and seizures are caused by doing cocaine.
If doing drugs by needle its possible that the mother has HIV and can pass it to the baby.
Can have a cleft lip and cleft palate with associated birth defects of the brain, heart, and kidneys.
Detections are well its pretty obvious the baby is shaking and nonstop crying after birth.
The point is dont drink or smoke dont even get near people who are smoking.There are no treatments for most of these birth defects.