UCTD is a term for connective tissue disease very like lupus that has no specific for lupus or any other specific CTD.
Many people can be diagnosed with lupus instead, it just depends on the doctor's preference. So pregnancy with a UCTD diagnosis is just the same as pregnancy with lupus.
You should discuss with your rheumy to see if he has any special concerns in your particular case and plan medication options and so on. Also a high risk ob gyny would be the norm, even if it turns out to be unnecessary. UCTD might worsen or might improve or might stay the same during pregnancy.
You should start thinking about
preconception supplements such as folic acid.
Take medical advice on supplements though