“…Trisomy X (47 XXX or mosaic) (Allen et al, 2007;Chapman et al, 2015;Dawood et al, 2018;Kirshenbaum and Orvieto, 2019;Wesevich et al, 2020) Deletion of X chromosome (Allen et al, 2007;Chapman et al, 2015;Dawood et al, 2018;Kirshenbaum and Orvieto, 2019;Wesevich et al, 2020) Turner mosaic (45XO/46XX) (Allen et al, 2007;Chapman et al, 2015;Dawood et al, 2018;Kirshenbaum and Orvieto, 2019;Wesevich et al, 2020) Turner syndrome (Torrealday et al, 2017) Fragile X premature (Allen et al, 2007;Chapman et al, 2015;Dawood et al, 2018;Kirshenbaum and Orvieto, 2019;Wesevich et al, 2020) Autoimmune Chromosomal abnormalities, genetic polymorphisms, and single-gene mutations have been recognized as causes of POI (Wesevich et al, 2020). X-chromosomal defects linked to POI indicate that this chromosome is vital to normal ovarian function, as these defects cause POI development.…”