Estrogens and other steroids are relatively safe in acute overdose.<unk> has been assessed in single oral doses of up to 75 mg. General symptoms of estrogen overdose in humans may include nausea, vomiting, vaginal bleeding, and reversible feminization. While there are no known studies describing the acute toxicity of estrogen overdose in dogs, this species is known to be more sensitive to the toxic effects of estrogens than humans and other animals. The most serious short-term adverse effect of estrogens in dogs is bone marrow suppression and consequent pancytopenia, which can be life-threatening.
Estriol 
2-Hydroxyestradiol
Estradiol acetate
Estrogen 
Estrogen
11-Ketoprogesterone
Estradiol 
Estradiol