TY  - JOUR 
AU  - Andres-de Llano, J. M.
AU  - Ardura-Fernandez, J.
PY  - 2007
SN  - 0143-005X
UR  - https://uvadoc.uva.es/handle/10324/64726
AB  - Background and aim: Several seasonal variations have been found in birth rates in different countries at
different periods. The characteristics of the rhythmic patterns vary according to geographical location and
chronological changes. This study...
LA  - spa
PB  - BMJ
TI  - Decline and loss of birth seasonality in Spain: analysis of 33 421 731 births over 60 years
DO  - 10.1136/jech.2006.050211
ER  -