The average life expectancy for women in the U.S. is anywhere from 73.5 to 86 years of age. As the 48-year-old mother of a three-year-old, if I kick when I am 73.5, I’m going to be pissed.

That said, I always knew I’d be an older mom. When my college friends were getting pregnant, in their twenties and thirties, I never felt I was missing out. It was only after marrying Tony that I caught “baby fever,” and by then I was 40.

“Perfect,” I thought. I knew plenty of 40-something women who got pregnant with their 40-something eggs and gave birth to perfectly healthy babies. I would, too. Why not? After all, I didn’t look my age. If someone asked, “How old are you?” I’d say, without flinching, “I’m 40,” and was always secretly thrilled by their reaction: “You’re kidding me! I thought you were 30!” Oh, stop now…. If my outsides look 10 years younger than my biological age, I reasoned, shouldn’t my insides look just as good?

Apparently, this is not how it works. Needless to say, I now know plenty of 40-somethings with tired, old eggs, me and my eggs included.

I was 44 when I looked to domestic adoption as my means to motherhood. The month before our daughter’s biological mother gave birth and relinquished her parental rights, I celebrated another birthday. At 45, I had a beautiful, healthy baby girl to love and look after.

It’s only within the last year that I’ve begun feeling anxious about my age. Maybe it’s because the newborn/toddler stage, wrought with sleep deprivation and new-mom worries, was such a blur. I felt my brain stutter through every thought, and I’d say things like, “She sick. Me crying.”

But now that Beth is three, I can clearly, if somewhat obsessively, contemplate my demise. Yes, it’s all well and fine to look younger than my calendar years, but when I think about my age, the actual number–48–and the mortality stats, it’s shocking to consider that I could have only 20- or 30-something years left on this earth.

Shocking and unacceptable, actually, since this means I might not be around to see my 20- or 30-something-year-old daughter’s career take off. Or help her plan her wedding, or see her through childbirth or the adoption process, or be a lunch date away from hearing about all the joys and sorrows that life will undoubtedly send her way.

But here’s what’s most upsetting about being average when it comes to dying–I wouldn’t be around for the day my daughter sees her mother, and her biological mother, through a grown-up lens. What will it be like when she fully grasps that we were human, just like her? That we were each figuring out our lives, enduring our own disappointments, missteps, and blunders along the way? I hope she’ll look at us with understanding, kindness, and an empathetic eye roll, knowing that, in spite of how crazy we drove her, we loved her and did our best by her. Who knows, maybe she’ll discover that we were right about a few things? Imagine that.

Well, I, for one, don’t want to miss it. So, other than trusting that genetics are on my side, and watching out for the errant bus as I cross the street, I have decided that “average” isn’t going to cut it. I recently met with a nutritionist and have started eating a low-fat diet. I am jogging, or working up to a jog, for 30 minutes, three times a week. Sure, it’s nice to have a clear separation of thigh and butt, but these days my focus is on doing everything I can to have a healthy, strong body and an energetic life–no matter how long it might be. (Sigh….)

I’m shooting for 100. Who’s with me?

Reprinted with permission from Adoptive Families Magazine: http://www.adoptivefamilies.com/articles.php?aid=2392

Barbara Herel, 49, a mother to a now four-year-old daughter, by domestic adoption, writes the Improv Mom blog on AdoptiveFamiliesCircle.com. She comes from the improv/comedy world and has written sketch comedy for NBC, Oxygen, and VH1. She also writes for the corporate world, which is funny in its own special way. Her other comedic antics include cooking and dancing around the house to “My Sharona” with her four-year-old daughter. She can be found at her adoption blog, “Improv Mom,” at : http://www.adoptivefamiliescircle.com/blogs/blog/us_adoption