If u care pregnant it's normal to have I creased urination .besides that it could be that yiur sugar levels are increasing , you have a high fluid and water intake or your bladder isn't holding the urine due to some infection

Drinking too much fluid during the evening can cause you to urinate more often during the night. Caffeine after dinner can also lead to this problem. Other common causes of urination at night include: Infection of the bladder or urinary tract. Also check for your sugar levels, if your are pregnant and diabetes in pregnancy can lead to frequent urination at night.