daf bit: Nedarim 83

One who vows to become a nazarite must, at the completion of the period (typically at least a month), bring three korbanot (sacrifices): a sin offering, a burnt offering, and a peace offering. What if a woman made this vow and then her husband anulled it? The gemara rules that she must still bring the korbanot for the brief period when she was under the vow; the anulment is not "as if it never was". (83a)

(Oh, and by the way, apparently women can be nazarites. I didn't know that. I still don't understand why anyone (male or female) would do so.)