"2. The restrictions in §§ 188.210 and 188.215 of the Missouri statute on the use of public employees and facilities for the performance or assistance of nontherapeutic abortions do not contravene this Court's abortion decisions. The Due Process Clauses generally confer no affirmative right to governmental aid, even where such aid may be necessary to secure life, liberty, or property interests of which the government may not deprive the individual. DeShaney v. Winnebago County Dept. of Social Services, 489 U. S. 189, 489 U. S. 196. Thus, in Maher v. Roe, supra; Poelker v. Doe, 432 U. S. 519; and Harris v. McRae, 448 U. S. 297, this Court upheld governmental regulations withholding public funds for nontherapeutic abortions but allowing payments for medical services related to childbirth, recognizing that a government's decision to favor childbirth over abortion through the allocation of public funds does not violate Roe v. Wade."