Multiple choice Which of the following is/are example(s) of synthetic estrogens? Estrone Diethylstilbestrol Fosfestrol Only 1 Only 3 1 and 2 2 and 3 All are synthetic estrogens. Reveal answer Fill a bubble to check yourself D Correct answer Explanation This is the correct answer. Both are synthetic estrogens. Diethylstilbestrol is a synthetic nonsteroidal estrogen that was first synthesized in 1938. Fosfestrol is a synthetic estrogen used as an antineoplastic agent.