Missing parents in Swedish birth acts

Hello

I am going through some birth acts and I can see that the parents are missing, I wonder if I am seeing this correctly?

6 mars Olof Eriksson

https://sok.riksarkivet.se/bildvisning/C0028990_00235#?c=&m=&s=&cv=234&xywh=3413%2C2537%2C2489%2C1594

7 maj Catharina Börjesdotter

https://sok.riksarkivet.se/bildvisning/C0028990_00240#?c=&m=&s=&cv=239&xywh=693%2C1706%2C2176%2C1393

30 juni Ingeborg Nilsdotter
https://sok.riksarkivet.se/bildvisning/C0028877_00050#?c=&m=&s=&cv=49&xywh=834%2C2416%2C2074%2C1328