what are some of the problems that can happen during development?
Bith defects like spina bifida and other neural tube defects, prematurity, fetal alcohol syndrome , miscarriages, low birth weight and others.
Fetus
A developing fetus is highly susceptible to anomalies in its growth and metabolism, increasing the risk of birth defects. One area of concern is the lifestyle choices made during pregnancy. Diet is especially important in the early stages of development. Studies show that supplementation of the person's diet with folic acid reduces the risk of spina bifida and other neural tube defects. Another dietary concern is whether breakfast is eaten. Skipping breakfast could lead to extended periods of lower than normal nutrients in the maternal blood, leading to a higher risk of prematurity, or birth defects. 

Alcohol consumption may increase the risk of the development of fetal alcohol syndrome, a condition leading to intellectual disability in some infants. Smoking during pregnancy may also lead to miscarriages and low birth weight (2500 grams, 5.5 lb). Low birth weight is a concern for medical providers due to the tendency of these infants, described as ""premature" by weight", to have a hi
what is reactive attachment disorder? It is a severe and relatively uncommon disorder that can affect children. what causes it? It is based on a problematic history of care and social relationships. can it be diagnosed? It can olny be diagnosed by a psychiatrist and any assessment must include a comprehensive evaluation of the child's individual and family history. what are some of the symptoms? Infants up to about 18–24 months "may" present with non-organic failure to thrive and display abnormal responsiveness to stimuli. The core feature is severely inappropriate social relating by affected children. can this age group travel on plane? Many airlines refuse boarding for all babies aged under 7 days (for domestic flights) or 14 days for international flights. what kind of hair do they have? A fine, downy body hair called lanugo. can you find this hair in animals too? Yes, animals like seals and elephants too are born with this. how does this hair develops? It develops on fetuses as a normal part of gestation. how does the system of immunity work on the embryo? Embryo gets passive immunity from maternal IgG antibodies through the placenta.
wiki:2567149
Fetus [SEP] Developmental problems
A developing fetus is highly susceptible to anomalies in its growth and metabolism, increasing the risk of birth defects. One area of concern is the lifestyle choices made during pregnancy. Diet is especially important in the early stages of development. Studies show that supplementation of the person's diet with folic acid reduces the risk of spina bifida and other neural tube defects. Another dietary concern is whether breakfast is eaten. Skipping breakfast could lead to extended periods of lower than normal nutrients in the maternal blood, leading to a higher risk of prematurity, or birth defects. Alcohol consumption may increase the risk of the development of fetal alcohol syndrome, a condition leading to intellectual disability in some infants.