If "every person has a masculine and a feminine side" then why do kids need a mother and a father?
That doesn't make sense.
Any two- or one, or three, or five- people will do.
Two moms? Sure. They each have a masculine and a feminine side.
Two dads? Why not? They've each got a feminine side as well as a masculine side.
One dad? Why the hell not? He's got both a masculine and a feminine side to him. Who even needs a mom?
I don't know where you're getting this "masculine and feminine side" thing, anyhow.
While sex is biological, gender is merely a social construct, and doesn't have anything to do, really, with raising kids.
I didn't have a mom. I'm glad I didn't. I turned out fine.