Sources for the parents and their child can and should (if possible) include baptism or birth records for their children.
The source is for the parent and also for the child. Most or many baptism records and or birth records say something like this:
Mary Beth daughter of William and Susanna Anderson was born on xxx and baptised on yyyy at this place. That information is a source for both the parents and the child.
The same is true for a marriage record that says Mary Beth Anderson married on xxxx at this place to John Preston, her parents William and Susanna Anderson, his parents John Preston and Elizabeth Preston (sometimes the mother's maiden name is given.
Death records often have parents' names perhaps more often if a child died young.
These are the records that connect each generation to the one before and after the person profiled. If we don't have this information it can be very easy to mix up people with similar names in close locations
Genealogically Defined
We need at least one piece of evidence that will lead to the identification of his or her parents, one piece of evidence for each spouse(s), and one piece of evidence for each child."
So, examine your profiles. Can you check off these as complete?
1. A source that will identify the PARENTS?
2. Do you have a source for each SPOUSE?
3. Do you have a source for each CHILD?
https://www.wikitree.com/wiki/Space:Genealogically_Defined, you will also find this information on other WT help pages.
As an example this FS profile for Jane Elizabeth Ableson Madill https://www.familysearch.org/tree/person/details/LCWK-N5H
has multiple record sources that provide information for the names of her parents, her parents in law and for her children.