How Many Times Should a Woman Immerse in the Mikvah?

Good week,

Ashkenazi girls have the custom to immerse twice, once before the blessing and once after it. In contrast, Sephardi girls immerse only once after the blessing, though some among them have the practice to immerse three or seven times.

Sources: The custom of Ashkenazi girls is based on what was written by the Ba'er Heiteiv in Yoreh De'ah (section 1) in the name of the Shalah. See also in the Responsa of Chut Shani (section 141). Regarding the custom of Sephardi girls, see in the book Taharat HaBayit part 2 (section 15, paragraph 5).

With blessings,

Hillel Meiris