This interesting article from the Bump explains it well:

https://www.thebump.com/a/matrescence#5 

For a more scientific persective see:

Matrescence: Lifetime Impact of Motherhood on Cognition and the Brain 

ER Orchard 1,2,*, HJV Rutherford 1, AJ Holmes 2, SD Jamadar 3 ​ ​ ​

https://pmc.ncbi.nlm.nih.gov/articles/PMC9957969/ 

 10.1016/j.tics.2022.12.002

Parenting in the NICU  

https://inha.ie/project/parenting-in-the-nicu/

In the NICU - Caring for baby

Comfort activities  advice from National Maternity Hospital

https://nmhnicu.ie/understanding-medical-care-in-the-neonatal-unit/activities-you-can-do-as-a-parent-to-comfort-your-baby/