writing outline:
first paragraph: Introduction of antenatal education → imformation and definition related to baby' s healthy
main body 1: listening to music used as a methode for antenatal education→ the scientific explaination of this methode→ the benefit baby can get from this way
main body 2: baby acept imformation from mothers' voice→ scientific explaination about this methode→ the effect on babies in uterus
main body 3: several experiments related to the antenatal education which can
（haven't finish yet）
