Her mother died when she was an infantSource: Wikipedia
Especially because she never knew her mother … her principal mode of self-definition—certainly in the early years of her life with Shelley, when she was writing Frankenstein—was through reading. Endlessly studying her mother’s works and her father's, Mary Shelley may be said to have 'read' her family and to have been related to her reading, for books appear to have functioned as her surrogate parents, pages and words standing in for flesh and blood.
Mary Shelley lost her virginity in a graveyardSource: IFC FIlms
Shelley had a series of miscarriagesSource: Penn State Hazleton
My dearest Hogg my baby is dead—will you come to see me as soon as you can. I wish to see you—It was perfectly well when I went to bed—I awoke in the night to give it suck it appeared to be sleeping so quietly that I would not awake it. It was dead then, but we did not find that out till morning—from its appearance it evidently died of convulsions—Will you come—you are so calm a creature & Shelley is afraid of a fever from the milk—for I am no longer a mother now.
She was haunted by visions of her first unborn childSource: The Raven Report
She wrote Frankenstein during a dreary summerSource: Pinterest
I saw the pale student of unhallowed arts kneeling beside the thing he had put together. I saw the hideous phantasm of a man stretched out, and then, on the working of some powerful engine, show signs of life, and stir with an uneasy, half vital motion. Frightful must it be; for supremely frightful would be the effect of any human endeavour [sic] to mock the stupendous mechanism of the Creator of the world.