Hi practo user. As you will control the sugars the urinary infection will be cured.Do urine culture, if sensitive to nitrofurantoin give fir more days. If menopausal then meet gynaecologist, sometimes due to less hormones the perineal area becomes dry and urinary infection occurs frequently.
What treatment was she taking?
Have you consulted a gynecologist?
If not, then consult a gynecologist and get a urine culture test done. Also, since she is diabetes then ask your mother to consume less sweet items and drink plenty of water. This may help get relief from the urinary infection.
You can also visit my clinic International Fertility Centre located in New Delhi for further evaluation. My clinic offers varied gynecology treatments and services to help you have a successful treatment. You can mail me your contact details so that I can get in touch with you.