I am not a scientist, but I have some problems with the information as given. The numbers do not mean anything if they were not corrected for the amount of people born in any given month. Maybe there are more people born in the first 3 months of the year, than in other months? Also February has less days then other months and therefore there will be less people born in that month.
Islamic State militants blow up ancient Arch of Triumph in Palmyra (Reuters)
from the article: Israeli study: People born in winter more susceptible to cancer