A diabetic &hypertensive patient can ofcourse have pregnancy
.Only thing is both conditions have to be under perfect control before & throughout the pregnancy.A v.good diatory control,exersises, expert's advice has to taken regularly.
About missed abortions, certain pathological tests like-CBCT,blood grouping & rh typing, coomb's test if you are rh -ve,torch test are to be done The results shown to your obstratition .treatment before conception taken with expert advice.
after one week delay in periods ,the preg. is to be dignosed,obsratitian to be consulted .to strictly follow the treatment given .You may be adviced bed rest
, which is a must.
With all these precautions you can compleate 9 months of pregnancy,to deliver a healthy bony baby!
Wish you all the best!