• I'm Gen X and had my first child a month before my 40th birthday. • My boomer husband is seven years older than me and was 46 when she was born. • Raising kids was challenging from the start, and it's gotten harder to be a hands-on parent as I age.

I celebrated my 40th birthday with a party at a swanky rooftop bar in Manhattan.

Usually, I'd sink a few glasses of wine on such a happy occasion. But on that milestone birthday, I stopped at one because I was nursing the month-old baby sitting next to me in her car seat.

My first child arrived just four and a half weeks before the festivities. I found out I was pregnant at the age of 39 in September 2007, and she was born in May the following year.

The medical profession has largely retired the ghastly term "geriatric mother." However

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