"The appellees defend § 3(3) on the ground that it was enacted in the light of the General Assembly's "perception of marriage as an institution," Brief for Appellee Danforth 34, and that any major change in family status is a decision to be made jointly by the marriage partners. Reference is made to an abortion's possible effect on the woman's childbearing potential. It is said that marriage always has entailed some legislatively imposed limitations: reference is made to adultery and bigamy as criminal offenses; to Missouri's general requirement, Mo.Rev.Stat. § 453.030.3 (1969), that, for an adoption of a child born in wedlock, the consent of both parents is necessary; to similar joint consent requirements imposed by a number of States with respect to artificial insemination and the legitimacy of children so conceived; to the laws of two States requiring spousal consent for voluntary sterilization; and to the long-established requirement of spousal consent for the effective disposition of an interest in real property. It is argued that "[r]ecognizing that the consent of both parties is generally necessary . . . to begin a family, the legislature has determined that a change in the family structure set in motion by mutual consent should be terminated only by mutual consent," Brief for Appellee Danforth 38, and that what the legislature did was to exercise its inherent policymaking power "for what was believed to be in the best interests of all the people of Missouri." Id. at 40. The appellants, on the other hand, contend that § 3(3) obviously is designed to afford the husband the right unilaterally to prevent or veto an abortion, whether or not he is the father of the fetus, and that this not only violates Roe and Doe, but is also in conflict with other decided cases. See, e.g., Poe v. Gerstein, 517 F.2d 787, 794-796 (CA5 1975), appeal docketed, No. 75-713; Wolfe v. Schroering, 388 F.Supp. at 636-637; Doe v. Rampton, 366 F. Supp. 189, 193 (Utah 1973). They also refer to the situation where the husband's consent cannot be obtained because he cannot be located. And they assert that § 3(3) is vague and overbroad."