--- O99.350 Diseases of the nervous system complicating pregnancy, unspecified trimester

--- O99.351 Diseases of the nervous system complicating pregnancy, first trimester

--- O99.352 Diseases of the nervous system complicating pregnancy, second trimester

--- O99.353 Diseases of the nervous system complicating pregnancy, third trimester

--- O99.354 Diseases of the nervous system complicating childbirth

--- O99.355 Diseases of the nervous system complicating the puerperium