In a mountainous area of an Asian country, the physique of newborns born in February and March is generally not as good as that of newborns born in other months. After investigation, the staff of the local medical institute believe that the main reason for this phenomenon is the lack of food in winter and the inability of pregnant women to supplement nutrition, resulting in the weakness of newborns.
The statement 'A few wealthy families in the mountain area that can provide adequate nutrition for pregnant women still give birth to weak babies in winter' best supports the above findings.