Mothers of twins or triplets have almost twice the average risk of postnatal depression, a survey by the twins and Multiple Births Association showed today.
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双胞胎、三胞胎以及多胞胎的各种缺陷的发生风险远较借由生殖技术获得的相应胚胎的发生风险高。
The danger of defects from twin, triplet, and other multiple births is far greater than any risk posed by the fertility treatments themselves.