My mom refused to take me to the OBGYN because she thought it was condoning me having pre-marital sex. I ended up going myself when I was 16 just to be safe. But in my case I have 4 aunts and both grandmas with breast cancer and both my sister and I have PCOS so I kind of had to.

I would agree with going once you become sexually active. The main point is to check to see if you have any STDs or cervical cancer. You know your own body better than your mom or a doc do. Go whenever you feel ready.