According to research, fetal microchimerism, which refers to the presence of fetal cells in a mother's body, can persist for up to 27 years after birth, meaning these cells can remain in the mother's body for decades following pregnancy; essentially, a "memory" of the pregnancy that stays within her for a long time.

I was Rey say 27 years is a stretch. I was told 7 years

The babies stem cells also remain in the mothers brain and nervous system which helps reduce alzheimer’s and certain diseases. Pregnancies actually help women’s health, that’s where that pregnant glow comes from.