Tavnian
From Memory Alpha, the free Star Trek reference.
The Tavnians are a humanoid species whose two sexes are divided upon birth, with boys being raised by the men, and the girls by the women. Children are not told that the opposite sex exists until they are 16. Male children are considered the property of their mother's husband.
Tavnian wedding ceremonies are centered around the groom telling the bride why he wants to marry her and trying to convince her to take him as her husband. If anyone present doubts the groom's sincerity they can challenge the validity of the marriage.
In 2372 Lwaxana Troi fled from her Tavnian husband Jeyal in order to keep him from taking her baby when it was born. After researching Tavnian law Odo proposed that he and Lwaxana get married in a Tavnian ceremony so that her marriage to Jeyal would be annulled and his claim on her son would be illegitimate. (DS9: "The Muse")
