胎儿生长到7周就开始有胎动了。最初的活动仅局限于吞咽、眯眼、咂拇指、握拳头,渐渐地能伸展四肢、转身以至翻身。胎儿长到16周后,母亲便能感觉到胎动。科学家观察证明,在正常情况下,胎动期活动能力强的较活动能力弱的婴儿在出生后6个月内的动作发育要快。 Fetal growth to 7 weeks began to have fetal movement. The initial activity was limited to swallowing, squinting, thumbs, clenching fists, gradually stretching limbs, turning around and even turning over. After the fetus grows to 16 weeks, the mother can feel the fetal movement. Observations by scientists show that under normal circumstances, babies with weaker motility than those with weaker motility develop faster within 6 months after birth.