Oh, high is the price of parenthood,
And daughters may cost you double.
You dare not forget, as you thought you could,
That youth is a plague and a trouble.

Phyllis McGinley (1905-1978) American author, poet
“Homework for Annabelle,” New Yorker (15 Mar 1952)
    (Source)

Reprinted in Love Letters (1954). Full poem.