First of all it is important to keep records as to who is genetically linked. We want to avoid the Jewish term of mamzerim in which brothers, sisters, mothers and fathers do not marry one another. That is why keeping records is so important. According to Jewish law your father would be the natural father of the offspring of his sperm. Yet this method is not obligatory since it is an extraordinary method.
Jewish law recognizes that the woman who gestates and gives birth to a child is the child's mother.
The religious status of a child follows that of the gestational birth mother. A child born to a non-Jewish surrogate would require conversion. This ruling follows the Committee on Jewish Law and Standards of the Conservative Movement. This includes the Subcommittee on Biomedical Ethics. When another woman is involved in giving birth, then it becomes too complicated.