Birth Control: Scared To A Standstill

Most drugmakers dread the legal risks, so older methods still prevail

In the world of modern contraceptives, the Persona system is a high-tech throwback. Developed by UniPath, a unit of Unilever PLC, it's an electronic device that lets couples practicing the rhythm method know when it's safe to have sex. There's a green light for safe days, a red light when a pregnancy is likely, and a yellow light when the $75 device is unsure. On those days, the woman uses a dipstick urine test to determine her hormone levels. It's a perfect method for the '90s--free of drugs and implants, high on personal responsibility and abstinence.

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