Fey then returned to the screen as a doctor in a maternity ward dispatched to treat parents-to-be whose labor has inexplicably slowed. “I’m sorry to tell you that your baby isn’t shy. He’s pretending to be shy for attention,” she announces, as the infant (Larry Dean) capered about on an ultrasound screen. “Unless you want your son to become a grown man who is addicted to canceling plans, let me do my goddamned job,” Fey continued, before picking up a megaphone and shouting into the mother’s birth canal. “Honey, are you the diamond from my wedding ring? Because you are fake as hell and we can see right through you, okay?” A threat to leave the baby behind while the rest head out to karaoke finally gets the labor back on track. Things end with all the sketch’s members dancing to Naughty by Nature’s “Hip Hop Hooray,” which after Jurassic Park is the second 1993-vintage allusion of the night. And then it was time for Weekend Update, anchored by Ania Magliano and Paddy Young. Up …