antigestational drug

[ an-tee-jes-tey-shuh-nl, an-tahy‐ ]
/ ˌæn ti dʒɛsˈteɪ ʃə nl, ˌæn taɪ‐ /

noun

a drug that averts a pregnancy by preventing the fertilized egg from becoming implanted in the uterine wall.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019