May a Chatan recite any of the blessings at his own Sheva Brachot (seven blessings recited both under the Chupah and at the end of a meal with a minyan within seven days of the Chupah)?
AskTheRabbi.org answered:
At Sheva Brachot that are celebrated after the wedding there is no problem. Under the Chupah there are different opinions and the best thing to do is to ask the Rabbi officiating and abide by his decision.