My blood group is b+ while my husband is o-, we have been trying to conceive for 7years now, please is there what i can do to conceive?

See Gyn or REI Doc: You need to see your physician for a complete exam, tests for semen, ovulation, hormone levels, endocrine abnormalities, and even procedures to ensure patent fallopian tubes and cervix. Much of this can be screened with simple answers i.e. - normal cycles? Any prior infections/surgery/trauma? Prior children? Medical problems/medicines? Age? Call your doc & start your work-up soon & i hope it works.

Get tested : Your blood type isn't keeping you from getting pregnant. You need to have his sperm checked, get a test to check your tubes and a bit of blood work to see if you are ovulating.