Why does it become harder to process many inputs at the same time during pregnancy?

Why does time often feel slower toward the end of pregnancy?

Weeks 41–42

What happens in weeks 39–40

What happens in weeks 36–38

What happens in weeks 33–35

What happens in weeks 30–32

What happens in weeks 27–29

What happens in weeks 24–26

What happens in weeks 21–23