Halberlandt, professor of physiology at Innsbruck, invented the first hormonal contraceptive, Infecundin, using corpus luteum extracts from females rich in the hormone progesterone. His initial report on the contraceptive in this 28-page pamphlet may be translated as follows:
“I have been in contact for over 3 years with the therapeutic firm Gideon Richter in Budapest, and it is likely that in the near future a suitable ‘sterilizing preparation’ under the name ‘Infecundin’ will be available for systemic administration in clinical experiments as I had already announced in Vienna at the 4 th. Congress [Sept. 1930] of the World League for Sexual Reform”. He ended the pamphlet with this statement: "Theoretically, one of the greatest triumphs of mankind would be the elevation of procreation into a volunary and deliberate act."

Digital facsimile from muvs.org at this link.

(Thanks to Juan Weiss for this reference and its interpretation.)