Yes but it's very hard work. You need an A1c that's 6% or lower ideally and usually the baby will be delivered at 38 weeks rather than 40. The definitely won't let you go over.
There is a higher risk of infant death and also some birth defects if blood sugars aren't tightly controlled.
I have two children. First pregnancy was ok. Second one was really hard going. You need to speak to your diabetes team about it all and make sure your control is as tight as possible. If you go ahead and fall pregnant you will have a lot of extra hospital appointments and scans compared to a healthy person.
You also have to weigh up the risk of passing t1 on which I wish someone had drummed home to me as we may have looked at adoption if perhaps we had realised how risky it was.
That said lots of t1 diabetics do have perfectly healthy babies and pregnancies. Good luck!