Academic mothers have a pronounced seasonal variation in their offspring sex ratio. Wallner B, Huber S, Mitterauer L, Pavlova B, Fieder M. Comparative Study 2005; 26(6): 759-762 PubMed PMID: 16380678 Keywords: Austria:epidemiology, Educational Status, Employment, Faculty:statistics & numerical data, Female, Humans, Male, Mothers:statistics & numerical data, Parity, Pregnancy, Reproduction:physiology, Seasons, Sex Ratio, Social Class,. Citation OBJECTIVES: Environmental and socio-demographic factors can influence the variation of the human sex ratio at birth (SRB = the ratio of ma..... Read abstract Full text PDF