Some would be eating out more often with increased calorie consumption,
Increased time in front of television/computers, Less activity and less engagement in sports and physical play
<h2>Excuse me what is there to answer</h2>
Birth defects can be caused wither by internal genetic factors or external factors like drugs, radiation, smoking,...
Dana, who is concerned about the possibility that her baby will have defects, may do the following tests: screening test, that will show if she might have child with birth defect and diagnostic test like amniocentesis (analyzing small amount of amniotic fluid from the area surrounding the baby) which is more than 90% correct.
Well because the human body was designed to be symmetrical, If this were to happen the child would live until the body compensates, with an uneven gait. This uneven gait can affect the curvature of the spine if it goes on long enough causing exaggerated curvatures, called Scoliosis.
Here is an interesting fact though, a fracture through the epiphyseal plate of developing children when broken can actually stop growth of the bone causing almost the exact same thing.