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).
Five Common Causes of Sudden Unexpected Death Every EMS Provider Should Know. Youâre called to the scene where a 50-year-old male was working in his yard when his wife witnessed him collapse. Heâs found pulseless and apneic with no signs of trauma. His wife is performing CPR when you arrive.