expression, noun
one's own child; one's own children
Refers to one's own child or children, often with emotional warmth or parental perspective.
我が子の成長を見るのは嬉しい。
It's a joy to watch one's own child grow.
彼女は我が子のように生徒を大切にしている。
She cares for her students as if they were her own children.
More neutral and descriptive; 我が子 carries a stronger emotional or possessive nuance.
Compound of 我が (archaic possessive 'my') and 子 (child). The phrase is a fixed expression meaning 'one's own child'.