What are the relationship challenges that are encountered during the transition to parenthood?

Read: Transition to Parenthood (pdf attached to my first comment below)

Watch:

https://youtu.be/jOsX_HnJtHU

https://youtu.be/KvbajNOETR0

https://youtu.be/PBYdvMtoYns

https://youtu.be/cul4L441x9o

Prompt: In the social sciences, the “transition to parenthood” begins when a couple becomes pregnant for the first time and lasts until the child is about two.

What are the relationship challenges that are encountered during the transition to parenthood?

How do men and women perceive the transition to parenthood differently, and how does it affect their relationship satisfaction? We are told that wanting and having children is “normal” or even “expected” in most cultures, but what about couples who do not want to have children–what is their relationship and life satisfaction like?