yī / shēng / jiàn / yì / zhè / duì / fū / fù / xiān / zuò / jiǎn / chá / yǐ / liǎo / jiě / yǐng / xiǎng / shēng / zhí / lì / de / yīn / sù

医生建议这对夫妇先做检查，以了解影响生殖力的因素。

The doctor advised the couple to undergo tests to identify factors affecting fertility.