The various permissible positions have been discussed already under the relevant section (chapter 5.0). The standing posture, although permissible, is undesirable for intercourse due to health reasons.
The author of TIBBUN-NABAWI writes that coitus in the standing posture causes the body to become weak. It also causes harm to the nerves and veins. He further writes that coitus on a full-stomach results in dim-witted, dull-minded progeny.
Coitus in the standing position also causes the condition of Ra’sha (perpetual Tremor). This is probably due to damage of the nerves and nervous-system.