Final answer:
Metrostenosis is the medical term for narrowing of the uterus, which can cause difficulties in conceiving or carrying a pregnancy to term.
Step-by-step explanation:
The narrowing of the uterus is called metrostenosis. Metrostenosis refers to the narrowing or constriction of the uterine cavity, typically caused by scarring or fibrosis of the uterine walls. This condition can lead to difficulties in conceiving or carrying a pregnancy to term.