1 Preseed maintains this alkalinity while other vaginal lubricants tend to have pH values below 7.0 and as low as 3.5 (very acidic and deadly to sperm.  Osmolality Ã¢â¬â Semen has a specific particle concentration that keeps sperm motile and healthy.
Causes of instantaneous or sudden death. Instantaneous or sudden death may result from dysfunction/abnormalities of the heart and its vessels, noncardiac vessels, pulmonary system, and central nervous system (CNS).
The severity of the disease varies widely, with most people experiencing few or no limitations on quality or length of their life; however, for a small minority of people, HCM is lethal. HCM is the most common identifiable cause of sudden death in young people, particularly athletes.