Spider Woman - in an early appearance - is nearly drowned, blasted and finally KO'd by Alicia masters, who herself has been turned into a spider-monster.

JC rescues an Amazon girl who gratefully takes him back to her city. But the Amazons want to keep him, so Dejah Thoris has to come and rescue him. She is wounded near the end, but luckily is revived by the local Goddess. This should have been a classic, but - apart from the cover - it didn't work for me.

Mantis "departs from her physical form". Source: Comic

Black Widow is knocked out by Master Man, and than she and The Falcon are taken to the Red Skull's hideout, where they are bound and gagged. Captain America saves them, though.

A guy hypnotizes a girl and tries to kiss her but she wakes up. Source: http://g.e-hentai.org

The cover depicts Dejah Thoris in a rather perilous situation. I initially thought she was unconscious. Spoiler alert: The final pages depict the death of a character, Linea. Yes, it is technically a death scene, but I felt the art and posing were good.

A girl who is a symbol for The Devil lies unconscious while magical stuff happens to her.

Interesting scene here. A girl gets on a bed and falls asleep very quickly. It probably has something to do with this "wire" that she pulled out of herself. The awkward boy she is with tries to plug it in her, "waking" her up. Is she a computer or something?

Just various pages (including cover) showing unconscious girls. One of them looks like she has elf ears.

A girl kisses another girl on the lips, causing her to faint. Both girls are wearing swimsuits. Included the sexy cover!

From Avengers, Volume 1, Issue #116 (Marvel, October 1973) -- the Scarlet Witch is KOed by, of all things, a volcanic eruption accidentally triggered by the Silver Surfer! While the Vision and Surfer battle it out, two enterprising natives decide to offer the sexy, helpless avenger to the volcano god; a rare two-person...

Here are some of the best KOs of the Scarlet Witch, from Avengers, Volume 1, Issues #185-187 (1979). There are also KOs of the Wasp and Ms. Marvel. The Wasp scene is one of my favorite KOs of her character, as it occurs when Janet has grown to full-size and is gloating over her downed opponent. The Ms. Marvel scene, by...

Wonder Girl goes in search of a mysterious scarab that seemss to be sending her messages..after nearly being killed by a poisonous snake, she comes to in the lair of a ammorous beetle-prince.. Source: blog

The sea witch Nikra head ko's Wonder Chick and dumps her in the drink..luckily, her teamates are nearby to rescue her.. Source: blog

Wonder Girl and Robin captured by Dr. Light, in a short lived attempt to revive this title before DC's total revamp five years later. Art is uneven, but some nice drawings of Wonder Girl in her groovy red jumper... Source: blog

Girl has a drink of some sorts and falls asleep every time!! Source: http://g.e-hentai.org

From Avengers, Volume 1, Issue #112 (Marvel, June 1973) -- The villain "Lion God" KOs the Black Widow with an energy blast; the Scarlet Witch is shown already unconscious (her KO was sadly off-panel). Source: My Collection

From Avengers, Volume 1, Issue #137 (Marvel, July 1975) -- the Wasp is KOed by an explosion, and cradle-carried by Yellowjacket. Source: My Collection

The cover shows the Invisible Woman being electrocuted by the woman from the previous issue. Inside, we see her unconsious in a patient gown, laying on an operating table. She wakes up for a short time, but then she falls unconsious again. There's also another woman in a coma like state who the doctor plans to have...

From Avengers, Volume 1, Issue #127 (Marvel, September 1974) -- Medusa and Mantis faint. The Swordsman can be seen cradle-carrying Mantis. Source: My Collection