From the Maryland Department of Juvenile Services:
Article 1, 1 24, of the Maryland Annotated Code provides that the age of majority is 18, and that a person reaching that age is an adult for all purposes, except when specifically provided otherwise by statute. Unlike some other states (like California), Maryland does not have a youth emancipation act. There are some instances in which a Maryland youth may become emancipated. For example, § 2-301 of the Family Law Article permits the emancipation of a minor by marriage. That means that the child is freed from the control of the parents, and the parents are free from the duty to support the child. Emancipation by marriage does not free the child from the legal disabilities (voting, drinking, ability to enter into contracts, etc) imposed on minors unless a statute specifically says so. A minor who is married has the same capacity as an adult to consent to medical treatment or to hold title to property as a tenant by the entireties with a spouse who has reached the age of majority.
Note that such a marriage would generally require both sets of parents to agree ... not likely here, and no court is likely to consider such a marriage in the best interests of the child even if they both reach the minimum age for such a marriage in a year.
Here is a further link from the MD DJS:
Emancipationof a Minor
Ninjamon, you have no legal standing here. You may feel you have a moral responsibility, but you have no LEGAL position here. None. You can always support your son by hiring an attorney and going to court to establish paternity and seeking visitation when the child is born. But, any thought that the pregnant minor will be permitted to live with you is a pipe dream.