UNITED KINGDOM - MARCH 05: Objects shown include a Persona monitor (for measuring the amount of a specific hormone in a woman's urine to see whether or not she is fertile), Delfen contraceptive foam (intended for use with another contraceptive, such as a diaphragm), emergency contraceptives ('morning after' pills) and a Femidom. (Photo by SSPL/Getty Images)
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SSPL Science & Society Picture Library