Final answer:
The nurse should inform the client that urinary frequency usually disappears at about 12 weeks of gestation but may return near the end of the pregnancy due to pressure on the bladder from the enlarging uterus.
Step-by-step explanation:
The nurse should respond to the client at 7 weeks of gestation reporting urinary frequency by saying that urinary frequency usually disappears at about 12 weeks of gestation, but it may return near the end of the pregnancy. The enlarging uterus presses on the bladder, which can cause urinary frequency to worsen following fetal descent. The client can expect some relief from urinary frequency in the second trimester, but it may return in the third trimester.