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...chose 20 volunteers whose T cells had dropped from a normal level of about 1,000 cells per ml of blood to fewer than 500. The newest PCR tests showed that the viral load of these patients was holding steady at about 100,000 copies per ml of blood. Ho started treating his subjects with one of the new protease inhibitors being developed by Abbott Laboratories. As expected, the amount of virus that could be measured in the patients' blood practically disappeared. The treadmill had been stopped. But no one was ready for what happened next...
With these abysmal odds, a man clearly needs every last sperm cell he's got. Any fewer than 20 million or so per ml of semen--40 million to 120 million in a typical ejaculation--and his chances of fathering a child begin to plummet. That's why doctors are so concerned about a trend they have noticed over the past few years. In study after study, sperm counts in men the world over seem to be dropping precipitously...
...Copenhagen. Skakkebaek and his colleagues did what is called a meta-analysis: they combined the results of 61 separate studies of sperm count and quality over the past 50 years in men around the world, and found that the average sperm count had fallen from about 113 million per ml in 1938 to 66 million...
...white blood cell called CD4. It is the linchpin of the immune system and the main target of HIV. As a general rule, people who become infected by HIV suffer a drop in their CD4 count from a normal level of about 1,200 cells per 1/1000th of a mL of blood to 500 cells or less. The risk of developing one or more of the illnesses associated with AIDS rises dramatically if the CD4 count drops below...
...Angeles, travels widely to talk to women's groups about "menstrual extraction," a home-abortion procedure she co-developed in the early 1970s. A suction technique similar to the vacuum-aspiration process that is now the most common form of first-trimester abortion, it requires a 50-mL syringe attached to a flexible plastic tube, which withdraws the contents of the uterus and deposits them into a closed container...