A New York doctor who donated his sperm to help a gay colleague conceive has been ordered to pay child support for the boy, now an 18-year-old living in Oregon, the New York Post reported Sunday.

The donor was a married doctor at a Long Island hospital in the late 1980s when he donated his sperm to a female hospital resident who was trying to have a baby with her lesbian partner, the Post reported. Although the donor gave up all claims and rights to the child, he allowed his name to be put on the birth certificate.

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For several years after the boy's birth in 1989, the doctor sent the child gifts and money and cards signed "Dad" and had regular contact with the child, the Post reported. However, when the boy moved to Oregon with his mother and her partner in 1993, regular contact stopped. Since then, the man's contact with the child consisted of seven phone calls and one brief meeting over the past 15 years.

A New York family court judge ruled last month that the man must now pay child support for the boy, now 18 and heading to college, the Post reported.