Brittany, those are some very wide topics. You'll get more answers if you specify exactly what it is you are looking for.
Such as: What kind of support does the mother need during her pregnancy? After she has the child?
Asking such a broad question as 'Needs of the mother, father and child' is going to give everyone that mouth agape feeling like they don't know where to start.
First of all, the needs of the child are the same as the needs of a child born to a mother in her 30's. Children's needs don't change because they are born to teenage mothers.
More specific questions will get you more specific answers.
Good luck with your report.