Persona monitor, 2000.
3 4 c m
actual image size: 32cm x 26cm

Persona monitor, 2000.

© Science Museum / Science & Society Picture Library


This device measures the amount of a specific hormone in a woman's urine. During ovulation, the amount of this hormone in the urine changes and the device can indicate whether or not it is safe for a woman to have sex without becoming pregnant.

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