Medical and demographic information is used to explain that population growth is exceeding world food supply. Section on birth control options. Medical illustration of female anatomy from front view. “The Foam.” Gloved hands demonstrate filling an early dispenser with spermicide foam and demonstrate ejecting it. Side illustration of female sex organs. Title “Diaphragm.” Ungloved hands demonstrate a diaphragm. Title “Rhythm.” Calendar chart highlighted with ‘risk’ days.