What is the ruling regarding a girl who lost her virginity unknowingly while young, and how can she inform her husband of this, and is there a way to restore virginity, and what is the extent of the impact of that on the marriage?

A girl should not refrain from marriage due to the loss of her virginity, as there are great benefits in marriage. She is not obligated to inform the suitor about the loss of her virginity unless he stipulates it, and its loss does not affect the validity of the marriage. The general rule is that hymen reconstruction surgery is not permissible, unless a chaste woman whose hymen was lost due to a permissible cause fears harm to herself; in such a case, it is permissible out of necessity or need.