Why does it matter if you were married to the father of your children or not in custody cases?

When a married woman gives birth her husband is assumed, legally, to be the father of the child and he has all the legal rights and responsibilities regarding that child. When an unmarried woman gives birth, the paternity must be established legally by the father signing the birth certificate or establishing his paternity through a DNA test. In the case of an unmarried woman, the woman who gave birth is a matter of record. The father's identity is not.
When a married woman gives birth her husband is assumed, legally, to be the father of the child and he has all the legal rights and responsibilities regarding that child. When an unmarried woman gives birth, the paternity must be established legally by the father signing the birth certificate or establishing his paternity through a DNA test. In the case of an unmarried woman, the woman who gave birth is a matter of record. The father's identity is not.

When a married woman gives birth her husband is assumed, legally, to be the father of the child and he has all the legal rights and responsibilities regarding that child. When an unmarried woman gives birth, the paternity must be established legally by the father signing the birth certificate or establishing his paternity through a DNA test. In the case of an unmarried woman, the woman who gave birth is a matter of record. The father's identity is not.

When a married woman gives birth her husband is assumed, legally, to be the father of the child and he has all the legal rights and responsibilities regarding that child. When an unmarried woman gives birth, the paternity must be established legally by the father signing the birth certificate or establishing his paternity through a DNA test. In the case of an unmarried woman, the woman who gave birth is a matter of record. The father's identity is not.

When a married woman gives birth her husband is assumed, legally, to be the father of the child and he has all the legal rights and responsibilities regarding that child. When an unmarried woman gives birth, the paternity must be established legally by the father signing the birth certificate or establishing his paternity through a DNA test. In the case of an unmarried woman, the woman who gave birth is a matter of record. The father's identity is not.
When a married woman gives birth her husband is assumed, legally, to be the father of the child and he has all the legal rights and responsibilities regarding that child. When an unmarried woman gives birth, the paternity must be established legally by the father signing the birth certificate or establishing his paternity through a DNA test. In the case of an unmarried woman, the woman who gave birth is a matter of record. The father's identity is not.
When a married woman gives birth her husband is assumed, legally, to be the father of the child and he has all the legal rights and responsibilities regarding that child. When an unmarried woman gives birth, the paternity must be established legally by the father signing the birth certificate or establishing his paternity through a DNA test. In the case of an unmarried woman, the woman who gave birth is a matter of record. The father's identity is not.
When a married woman gives birth her husband is assumed, legally, to be the father of the child and he has all the legal rights and responsibilities regarding that child. When an unmarried woman gives birth, the paternity must be established legally by the father signing the birth certificate or establishing his paternity through a DNA test. In the case of an unmarried woman, the woman who gave birth is a matter of record. The father's identity is not.