父母的混合性别偏好被IVF双胞胎出生所揭示
C Y Cyrus Chu1, Chang-Ching Lin2, Shih-Ting Lu3
1Institute of Economics, Academia Sinica, Taipei City 115024, Taiwan.
概括
试管婴儿 (IVF) 显著增加了一个男孩和一个女孩的双胞胎出生,这是由父母的性别偏好驱动的,特别是在富裕的家庭中. 这一趋势凸显了生殖技术对家庭组成的影响.
科学领域:
- 生殖医学 生殖医学
- 人类遗传学 人类遗传学
- 生殖的社会学 生殖的社会学
背景情况:
- 众所周知,体外受精 (IVF) 会增加多胎儿出生率.
- 试管婴儿对双胞胎的特定性别构成的影响,特别是一个男孩,一个女孩的双胞胎的流行程度,尚不清楚.
- 从父母的性别选择中解开双胞胎增加率的影响是具有挑战性的.
研究的目的:
- 调查试管婴儿对双胞胎出生率和性别组成的影响.
- 确定父母的性别偏好在多大程度上影响了通过试管婴儿产生的双胞胎的性别比例.
- 分析影响试管婴儿采用和双胞胎性别组成的社会经济和时间因素.
主要方法:
- 分析了台湾数以百万计的行政出生记录.
- 按母亲年龄,家庭财富和时间段对家庭的分层.
- 检查在定义的人口群体内第一生双胞胎的性别组成.
- 统计测试父母的性别偏好,特别是一个男孩,一个女孩的双胞胎.
主要成果:
- 试管婴儿的采用显著增加,特别是在年长和富裕的母亲中.
- 在30年内,一男一女双胞胎在初生双胞胎中的比例从20.42%上升到41.86%.
- 这一比例与财富排名有正相关,超过预期的自然比率.
- 据估计,父母的性别偏好占最富裕群体中一个男孩-一个女孩双胞胎的10.95%.
结论:
- 试管婴儿显著影响双胞胎性别组成,父母的偏好起着显著的作用.
- 社会经济地位是试管婴儿利用和性别选择的表现的一个关键因素.
- 这些发现引发了有关使用辅助生殖技术的重要伦理和社会考虑.
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