子供はいない

don't have children

→ 子供
phrase Rare #20,519
don't have children Usually means that someone has no children. The は marks 子供 as the topic, and いない is the negative form of いる, used for living things. This is the plain, informal form; the polite form is 子供はいません.
JA: 子供はいないんです。
EN: I don't have any children.

でもあなたに子供はいない

But you don't have any children.

— コーラス (2004)

トムメアリーには子供はいない

Tom and Mary don't have any children.

私が知る限りでは子供はいないはずよ

As far as I know, she doesn’t have any children.

ドン・パブロそんなこと美人奥さんがいてあの年だそれなのに子供はいない

Don Pablo… He has such a beautiful wife, and at his age, yet he has no children.

— イル・ポスティーノ (1994)

多分子供はいない

They probably don't have any children.

子供はいないんです

I don't have any children.