The right environment would be inside the uterus and the cervix. In certain environments, such as the cervix, uterus and fallopian tubes sperm have a life-span of up to five days. That's why a woman can get pregnant if they ovulate within 5 days after intercourse.
Problems with sleep, such as insomnia, are an acute risk for suicide, whether or not they are part of a depressive episode. It is important to note that sleep problems increased the suicide risk, even after controlling for other variables such as gender, mood, and alcohol problems.
The authors stressed that for sleep apnea patients, the risk of sudden cardiac death does not simply shift from daytime hours to night-time hours, but that their overall risk of sudden cardiac death is higher than people without sleep apnea..