Research indicates this can prevent the baby from getting the oxygen and nutrients it needs to grow--potentially leading to fetal injury,premature birth,or low birth weight.

 
  • 研究表明,这会妨碍胎儿获得发育所需要的氧气和营养物质,这可能对胎儿造成伤害,引起早产或胎儿体重不足。
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