Refractory period (sex) after orgasm in which further sexual stimulation does not produce excitement. While the refractory period varies widely among individuals, ranging from minutes to days, most men cannot achieve or maintain an erection during this time, and many perceive a psychological feeling of satisfaction and are temporarily uninterested in further sexual activity; the penis may be hypersensitive and further sexual stimulation may feel painful during this time frame. An increased infusion of the hormone oxytocin during ejaculation is believed to be chiefly responsible for the male refractory period, and the amount by which oxytocin is increased may affect the length of
Birthing chair delivery and increases comfort" for expecting mothers. The position of the birthing chair allows muscles(including vaginal and abdominal as well as those in the back, stomach, legs, and arms) used in childbirth to work to efficiency. Since the 1980s many hospitals have begun installing birthing chairs due to the large number of inquiries about them. A modern birthing chair/stool can be made of many different materials including PVC inflatables such as the CUB support, plastic such as the Kaya stool and padded wooden stools. More recently birthing chairs/stools have been made to accommodate several upright positions such as squatting, all