Refractory period (sex) for treating sexual dysfunction. Sildenafil, used in the treatment of erectile dysfunction, was found in one scientific study to have caused "a decreased postejaculatory erectile refractory time (3.2 ± 0.7 vs. 6.4 ± 0.7 minutes)" in men diagnosed with premature ejaculation. It is additionally proposed that the gonadotropin inhibitory hormone (GnIH), which is considered to inhibit the hypothalamic-pituitary-gonadal axis and sexual functions causes refractoriness of the post-ejaculatory refractory period. This hypothesis also supports the increase of oxytocin and prolactin after orgasm in accordance with the previous studies. One alternative theory explains the male refractory period in terms of a peripheral
Birthing chair for women to lie on during delivery. A woman giving birth in the upright position has been seen in Asian, African, Pacific Islander, and Native American art. The concept of the birthing chair has also been written in observations by anthropologist as well as missionaries. As of the 1980s the birthing chair has been making a comeback in the modern medicine of childbirth. Some expecting mothers have reverted to the birthing chair for its upright position because it allows gravity to assist in the expulsion of the baby. Studies have shown that the birthing chair speeds up the time of