Any advice for my defiant pregnant daughter? ?

My daughter Jasmine is 15 and she's due with a baby in November. She's turning 16 in September. Well she is almost 20 weeks along and she doesn't let the doctor do anything. She's only let them do a pelvic exam once, she's only let them do an exam once, she's only peed in a cup once, she's only let them take her blood once, she won't let them do anything. I've talked to her, so has her doctor and we've told her she's gonna effect the baby. What more can I do to make sure she gets the care she needs? She wants this baby, she's just doesn't want all the prenatal stuff done. Please help! Don't tell me she's a brat, she is right now. Just please give me some advice.