Katsouyiannopoulos V
J Epidemiol Community Health. 1981 Sep;35(3):218-9. doi: 10.1136/jech.35.3.218.
A significant fall of 33% has occurred in the incidence of twins in Greece over the past 45 years. In 1933-5 the twinning rate in the whole country was 14.3 per 1000; in 1974-6 it was 9.6 per 1000. The decline was smaller in Greater Athens than in rural and urban areas outside the city. Changes in the fertility behaviour of the women of Greece, a reduction in parity, and the shorter reproductive life of mothers, were the main reasons for the decline in the incidence of twins. The pattern of change has been different in the rural and urban populations outside Athens, which explains the steeper decline in the twinning rate in those areas.
在过去45年里，希腊双胞胎的出生率大幅下降了33%。1933年至1935年期间，全国的双胞胎出生率为每1000人中有14.3例；1974年至1976年期间，这一数字为每1000人中有9.6例。大雅典地区的下降幅度小于城市以外的农村和城市地区。希腊女性生育行为的变化、生育胎次的减少以及母亲生育寿命的缩短，是双胞胎出生率下降的主要原因。雅典以外农村和城市人口的变化模式有所不同，这解释了这些地区双胞胎出生率下降幅度更大的原因。
