[The seasonal variation in the sex ratio of new borns and the influence of a marked decreased of the birth rate on this ratio (author's transl)].
D000367:Age Factors; D005260:Female; D005306:Fertilization; D005860:Germany, West; D006801:Humans; D008297:Male; D012621:Seasons; D012744:Sex Ratio
Die jahreszeitlichen Schwankungen der Sexratio Neugeborener und ihre Beeinflussing durch stark erniedrigte Geburtenraten.