I'm all for either or both. I have know families that have both biological children and adopted children. Some adopted their first and then got pregnant, where others had one, but wanted more kids but couldn't have anymore naturally. Talk with other women who have similar medical issues that you do and have had babies and see what they say.
I had some friends that always swore they would never have children. She had alot of issues with her family and attempted suicide more than once. It was not long after the second attempt that they moved closer to his parents, a good 6 hours away from hers. Within about 2 years they were expecting their first baby. They now have 2 and he is a stay at home dad. He is the one that alway said he wouldn't be capable of loving anyone else.