Is it true that a 15 year old female body that's not fully matured get pregnant and can have her period as well?

I read it from a thread a long long time ago so I wonder if this is true or not

I'm very curious about human body and other things related to biology :D sorry for asking a lot

As long as your body is mature enough to have a period your body is mature enough to get pregnant.

I meant to say if she's pregnant can she still get her period at 15 whiele being opregnant

It is possible but not probable

Many women still get their periods early on in pregnancy, but it is not all that common.

Now, a 15 year old who is pregnant is at risk for many pregnancy related disorders such as preeclampsia, placenta previa, and gestational diabetes just to name a few.

There is also a higher risk of SIDS deaths to babies born to mothers under 20 years of age.