Régnier-Loilier, Arnaud; Rohrbasser, Jean-Marc - Institut National d'Études Démographiques (INED) - 2011
In the 17th century in France, there were more births between January and April, and fewer between May and December. Twice as many children were born in March as in June. This pattern of births was long thought to be a product of nature, with the increase in conceptions from April being linked...