An OB/GYN not only cares for women during their pregnancy, but they also provide preventive medical care for the reproductive system, particularly for the prevention of reproductive cancers. Some of the more common cancers women may be tested for are breast, cervical, endometrial, ovarian, and uterine. If an OB/GYN fails to diagnose one of these cancers – or other gynecological issues – there can be great medical consequences, including infertility or death. These types of cases are responsible for one-third of OB/GYN malpractice cases.