"[T]he interests of married couples in using abortion to avoid parenthood were not represented in Roe because the trial court found that they too lacked standing. Though the availability of abortion technology implicated different interests and relationships of married, as opposed to single, women and their spouses, the trial court found the interests of John and Mary Doe too speculative to present a justifiable controversy. As a matter o fact, the Does had conceived a child prior to the suit an obtained an abortion. How different, then, was their situation from that of Norma McCorvey at the time of the district court hearing, after she had given birth, when the court found that her claim was not moot because she might become pregnant again and wish an abortion? Did the fact that the Does had been able to obtain an abortion by traveling out of the country, while McCorvey could not afford to do so, deprive them of standing they would otherwise have had, even as members of the lass represented by Roe? We are not informed by the trial court’s cursory treatment of standing issues."