Answer:
They don"t or do so in very carefully guarded terms. it has been used ( mainly pregnancy) in a variety of sitcoms. there is anticipation, but no pounding pulse- bomb-squad ( oddly just outside I hear a police siren!) type of life-and-death suspense. it is rarely if ever dealt with as a Down angle. when the doors open it is always good news never get out your Black mourning garb. The very idea of an unwanted pregnancy is or was a (no No) in my day ( programs made in the fifties and sixties. though one character in a sitcom about a Hotel seemed to have Bulges below decks quite often.