Medically, the premature delivery
could have been cause by uterine failure, which is likely in women who have had many many babies, very close together.
Michelle had pre eclampsia.
Women in my family have always had babies into their 40s and sometimes even in their 50s. But, they weren’t having them every 18 months. A woman’s fertility naturally slows down as she gets older. Genetically, I have every reason to believe that I will continue to ovulate for many years to come. However, because I keep track of my cycles, I know that already (and I’m only in my mid-thirties) I do not ovulate as often as I once did. I don’t believe that Michelle Duggar is conceiving these children, this late in life, this close together, without TRYING to do so.
Lada, WHY do you CARE??!!??

YOU do not have to pay for them or take care of them! They are a loving family. I think those kids are darn lucky.
I am in my mid-40s. I also keep track of my fertility. I can tell you that my cycles are getting shorter (from a regular 33 days in my “youth” to a regular 27 days now.) MY ovulating days are getting more frequent as I age, not farther apart.
You have GOT to get off your high horse about this family. Your way is not the only way. The Duggars are doing what works for them. Their way obviously would not work for you! But it works great for the Duggars.
And nowhere does it state a “good Catholic” must breastfeed for 1 year! There are multitudes of fabulous Catholic parents - and non-Catholic parents - who do not breastfeed AT ALL! Their children are no less loved, cherished, or cared for than the child who is breastfed for 4 years!