Twinning in Greece.
Mean MZ and DZ twinning rates in seven big Greek cities were 3.2 and 4.75 per 1,000 maternities, respectively, during the 1980-1985 period. The seasonal variations in twinning frequencies are not significant. The total twinning rate in Greece shows a decreasing trend from 1956 to 1985.
Kataki
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Department of Biology, University of Thessaloniki, Greece.
Kouvatsi
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D000328:Adult; D005260:Female; D006115:Greece; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D008297:Male; D010298:Parity; D010331:Paternal Age; D012621:Seasons; D012744:Sex Ratio; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic