does environmental element effects it?
Yes, factors like smoking and combustion of solid fuels affect it.
Low birth weight
While active maternal tobacco smoking has well established adverse perinatal outcomes such as LBW, that mothers who smoke during pregnancy are twice as likely to give birth to low-birth weight infants. Review on the effects of passive maternal smoking, also called environmental tobacco exposure (ETS), demonstrated that increased risks of infants with LBW were more likely to be expected in ETS-exposed mothers.

Regarding environmental toxins in pregnancy, elevated blood lead levels in pregnant women, even those well below 10 ug/dL can cause miscarriage, premature birth, and LBW in the offspring. Although 10 ug/dL is the US Centers for Disease Control and Prevention's “level of concern”, this cut-off value still results in significant harm to gestating fetuses.

The combustion products of solid fuel in developing countries can cause many adverse health issues in people. Because a majority of pregnant women in developing countries, where rate of LBW is high, are heavily exposed to indoor 
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. 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. what causes low weight at birth? It is caused either by preterm birth or by the infant being small for gestational age or both.
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Low birth weight [SEP] Environmental factors
While active maternal tobacco smoking has well established adverse perinatal outcomes such as LBW, that mothers who smoke during pregnancy are twice as likely to give birth to low-birth weight infants. Review on the effects of passive maternal smoking, also called environmental tobacco exposure (ETS), demonstrated that increased risks of infants with LBW were more likely to be expected in ETS-exposed mothers. Regarding environmental toxins in pregnancy, elevated blood lead levels in pregnant women, even those well below 10 ug/dL can cause miscarriage, premature birth, and LBW in the offspring. Although 10 ug/dL is the US Centers for Disease Control and Prevention's “level of concern”, this cut-off value still results in significant harm to gestating fetuses.