母乳
breast milk
乳児用粉ミルク
formula milk
baby formula
仰向け
facing upward
仰向けに寝る
lie on one's back
仰向けになる
turn on one's back
仰向けにする
turn something face up
うつ伏せ
lying on one's face
うつ伏せになる
lie on one's face
うつ伏せタイム
tummy time
tummy ... おなか、ポンポン
ポンポンペイン
tummy bug
首が座る
holding up one's head
lifting up one's head
stable
She can holding up her head
Her neck is becoming stable.