Thank you for your query.
Retention of urine is sometimes common in pregnancy
when the uterus
is retroverted ( bent backwards ) and hence causes pressure on the bladder and urethra
, leading to obstruction of urine flow.
She should definitely go the hospital, and get the urine drained.
Sometimes, an indwelling catheter is required for upto some days, as the pregnancy grows, the uterus will lift out of the pelvis, thus relieving the pressure and solving the problem.
Sometimes, a full bladder can cause miscarriage
also, so first priority should be to drain the overfull bladder.