Can a DNC cause me to not be able to have children?

well my boyfriend and i have been trying to have a baby. its been three months and nothing. i have been pregnant 3 times lost all of them but had to have 2 DNC's. he is 32 and has no children but has tried and nothing. im 22. Im not sure if its me or him. but we have gone a whole month trying. so im not sure what to do. please help.