Quark: Did you hear? Keiko’s gonna have another baby!
Worf: Now?
Miles O’Brien: No! Seven months.
Worf: I see…
Miles O’Brien: Worf delivered Molly, you know.
Julian Bashir: Really?
Miles O’Brien: The Enterprise was damaged. Keiko and he were trapped together when her time came.
Julian Bashir: Oh well, I’ll, uh, be sure and call you, when she’s ready to deliver; you can lend a hand.
Worf: Seven months? Unfortunately I will be away from the station at that time… Far away… Visiting my parents, on Earth… Excuse me.

Star Trek: Deep Space Nine, Season 4: Episode 17 – “Accession”