The correct answer is C. A large cohort study of nondiabetic pregnant women who received antipsychotic prescriptions during the 3-month period before pregnancy showed that women who continued antipsychotic treatment during pregnancy with olanzapine or quetiapine had increased relative risk of developing gestational diabetes (RR 1.6 and 1.3 respectively) as compared to women who discontinued use of antipsychotics before the start of pregnancy.. Increased risk was not seen with aripiprazole, risperidone, or ziprasidone. A is incorrect because about 50% of women with gestational diabetes developed type 2 diabetes mellitus in the decades following pregnancy. B is incorrect because the crude risk of gestational diabetes in the study was approximately 12% for those who continued olanzapine and 4.7% for those who discontinued olanzapine. D is incorrect because gestational diabetes increases the risk of all of the listed complications.

Publication reference : Park Y, Hernandez-Diaz S, et al. Continuation of atypical antipsychotic medication during early pregnancy and the risk of gestational diabetes. Am J Psychiatry 2018; 175: 564-74.
Reference URL: https://www.ncbi.nlm.nih.gov/pubmed/?term=29730938