'''Oestrogens''' are the hormones responsible for inducing oestrous in females. '''Estradiol''' is the principle oestrogen in the female.'''Estrone''' and '''Estriol''' are chemically similar to estradiol but are found in lower concentrations and have a lower estrogenic activity. | '''Oestrogens''' are the hormones responsible for inducing oestrous in females. '''Estradiol''' is the principle oestrogen in the female.'''Estrone''' and '''Estriol''' are chemically similar to estradiol but are found in lower concentrations and have a lower estrogenic activity. |