in the 1960 film by Phil Tucker, Cape Canaveral Monsters, space aliens form another planet come to Earth to prepare for an invasion. the aliens also need human specimens to send back to their planet for study, especially young and health females.
there is a capture scene in the film where a young girl is tranquilized by what the aliens call a needle blaster. after the girl is tranquilized she is carried back to the alien's lair. there, the uncounscious girl is placed onto a table where she has her clothing carefully removed and then she is prepared for transport to the alien world for study.
do to 1960's censorship Phil Tucker couldn't show full nudity. in this lovely scene the uncounscious girl is turned on to her side, and then her bra is removed and her panties are sliped off. in the next scene she is wearing metallic blanket. after the girl was transported you see the aliens folding the blanket.
I have always enjoyed seeing uncounscious naked girls being used for scientific study. the televison sci-fi series, Cleopatra 2525 seem to imply on the subject of human specimens for scientific study.