Interesting scene from a 1989 issue of Batman. Batman sneaks into a woman’s apartment and chloroform’s her.

Negative Woman is run through by an electrical sword, knocking her out. She is then slung over a horse (I've classified that as an OTS!)

The Earth 2 Huntress is KO'd by Black Canary.

Black Canary is used as a human dartboard here. The Earth 2 Huntress (Paula Brooks) is also in peril.

From the He Man and The Masters of The Universe Episode. The Cat and The Spider. Teela is knocked out, we get a nice view of a limp Teela, before she is placed on the ground still out like a light. Source: Youtube

The Magdalena is lifted unconscious by a swarm of Darklings as Jackie stares ahead angrily. Source: http://readcomiconline.to/Comic/The-Darkness-1996/Issue-18?id=32142

A young woman is strangled unconscious.

A young woman is chloroformed, stripped and then bound and suspended by her hands.

Spider-Gwen is zapped by the Baxter Building's automated defense system.

George Jetson gasses a young woman before making a heroic sacrifice.

Catwoman punches out Poison Ivy to release her hold on Harley Quinn. Supergirl, who is in the room with Batman and Harley, briefly faints as Ivy's control is broken.

Sheena and Lirio are knocked out with tranquilizer darts.

Lara Croft, Knocked out and carried by thugs into a cell. Source: Deviantart

Red Sonja in her chainmail bikini is knocked out, bound in a spread-eagle position to a cross-shaped shackle, and then swarmed, completely covered and overwhelmed by the squirming, writhing tentacles of the N'Garai, a Lovecraftian eldritch abomination summoned by Kulan Gath, the demon sorceror. However Spidey breaks fr...

Black Canary of the DC Comics Bombshells nearly drowns.

Black Canary, knocked out, is being carried away by two criminals. Source: Deviantart

Some mild Mera peril from 1965.

Mera faints, and later is in some peril.

Mera in some very weak peril from her first appearance.

Superwoman is drained of her powers while fighting the villainess Midknight.