The law has always been concerned with paternity. Paternity was critical to the 
succession of monarchs and the inheritance of property. Paternity was a moral 
issue because of the church’s insistence on fidelity in marriage and celibacy 
outside marriage. Infidelity could mean disgrace for a man and death for a 
woman. The moral taint was so strong that the law punished the child as well 
as  the mother:
All the disabilities of bastardy are of feudal origin. With us it is of Saxon 
origin. The term bastard being derived from a Saxon word, importing a 
bad, or base, original. The disabilities of bastardy are the same under 
the  civil as under the common law, and in all ages and nations. He has 
no  ancestor; no name; can inherit to nobody, and nobody to him; can 
have no  collaterals nor other relatives except those descended from 
him. He can  have no surname, until gained by reputation. [
Stevesons’s 
Heirs v.  Sullivant, 18 U.S. 207 (1820).]
The stigma of bastardy lasted a lifetime and could blight the lives of the next 
generation, as witnessed by the heraldic bend (or bar) sinister on the family 
crest,  designating bastardy. In addition to inheritance, a bastard was denied 
entrance  into several callings and certain civil rights. These harsh laws 
persisted until  relatively recent times in England and the United States. The 
stigma of bastardy  was such that the common law developed legal 
presumptions in favor of  legitimacy.
The presumption of legitimacy was a fundamental principle of the 
common  law. Traditionally, that presumption could be rebutted only by 
proof that a  husband was incapable of procreation or had had no access 
to his wife  during the relevant period. As explained by Blackstone, 
nonaccess could  only be proved “if the husband be out of the kingdom 
of England (or, as the  law somewhat loosely phrases it, extra quatuor 
maria [beyond the four  seas]) for above nine months.…” And, under the 
common law both in  England and here, “neither husband nor wife 
[could] be a witness to prove  access or nonaccess.” The primary policy 
rationale underlying the common  law’s severe restrictions on rebuttal of 
the presumption appears to have  been an aversion to declaring children 
illegitimate, thereby depriving them  of rights of inheritance and 
succession, and likely making them wards of  the state. A secondary 
policy concern was the interest in promoting the  “peace and tranquillity 
of States and families,” a goal that is obviously  impaired by facilitating 
suits against husband and wife asserting that their  children are 
illegitimate. Even though, as bastardy laws became less harsh, 
“[j]udges in both [England and the United States] gradually widened the 
 acceptable range of evidence that could be offered by spouses, and 
placed  restraints on the ‘four seas rule’…[,] the law retained a strong 
bias against  ruling the children of married women illegitimate.” [
Michael 
H. & Victoria  D., Appellants v. Gerald D., 491 U.S. 110 (1989).]
The Michael H. case is a good, if unusual, example of this legal rule. Carole and 
 Gerald were married. During this marriage, Carole had an adulterous affair 
with  Michael. Sometime after this affair, the child Victoria was born. During a 
brief  separation from her husband, Carole and Michael had blood tests 
performed to  determine Victoria’s paternity. The tests established, according to 
the evidence  presented to the court, a 98% probability that Michael was 
Victoria’s father. After  a period of living with Michael and treating Victoria as 
Michael’s daughter, Carole  reconciled with Gerald. Michael, as probable biologic 
father of Victoria, sought  visitation rights with Victoria.
The California law, which was more than a century old, held that “the issue of a 
 wife cohabiting with her husband, who is not impotent or sterile, is conclusively 
 presumed to be a child of the marriage.” Subsequent revisions allowed this 
presumption to be “rebutted by blood tests, but only if a motion for such tests 
is  made, within two years from the date of the child’s birth, either by the 
husband  or, if the natural father has filed an affidavit acknowledging paternity, 
by the wife.”
Gerald had always acknowledged Victoria as his daughter. Carole, having 
reconciled with Gerald, also refused to request the court to examine Victoria’s 
paternity. Michael, as the probable biologic father, argued that this law denied 
him a constitutional right to establish a parental relationship with his daughter. 
The U.S. Supreme Court upheld the California law as a valid exercise of the 
state’s  right to protect the family relationship. The Court made it clear that 
biologic  parenthood did not supersede legal parenthood as defined by a state 
statute  reflecting the common law tradition.