Database Schema for Parent-Child Relationships - asp.net

Question

I need to develop a database schema for a pediatrics database that allows the following:
Store last name, first name, date of birth, and gender for each patient.
Store all applicable guardians that may include mother, father, legal guardian and their relationship to the patient (child).
Identifies patient siblings and their relationship to the patient.
4, Allows for patients to become guardians/parents over time.
Stores phones numbers linked to each individual including patients and parents/guardians.
I'm really locked up on the best way to tackle this problem. I'm considering three tables, tblPatients, tblGuardians, and tblTelephones, but I think this would require multiple entries for parents who have multiple children. I'm sure this problem has been solved in the past, but I haven't found a suitable answer. Any insight would be appreciated.

Answer 1

Allows for patients to become guardians/parents over time.
This is key. If patients may become guardians/parents later, you should probably have a table for "person" that describes any kind of person, and then categorize that person with other tables.
For example
PERSON table defines demographics, (last name, first name, date of
birth, and gender, phone number etc)
PATIENT Table defines patient data with FK, and points to
a specific PERSON, optionally with a unique constraint on
PATIENT.PERSONID to ensure that no two patients are the same
person. Presence of a record in this table implies a PERSON is a PATIENT
RELATIONSHIP table links two PERSON records together and defines a relationship. Person1ID, Person2ID, and RelationshipType for example.

Answer 2

Here's my approach to the problem.
tbl_person, columns:
id
first_name
last_name
birth_date
gender
contact info
other personal info
tbl_patient, columns:
id
tbl_person_id
"other columns related to the patient like reason, symptoms, diagnosis, etc"
tbl_patient_has_guardian(one-to-many), columns:
tbl_patient_id(primary key)
tbl_person_id(primary key)
patient_relationship_to_guardian_type
mother, father, etc
So when adding a new patient record, add the personal info to tbl_person, then reference tbl_person id to tbl_patient.
tbl_patient_has_guardian, one patient can have multiple guardians. The guardians has specific relationship type assigned to a patient, it could be a mother, father, etc.