Apple cider vinegar in alternative circles has been claimed to do lots of beneficial things for us, all unproven, undocumented alternate wishy-washy nonsense, so the answer is no.Should you want to reliably delay your period, up to three days in advance, you can take Primolut N (norethisterone) thrice daily one tablet of 5 mg until you want to have your period, in skinny girls twice daily 5 mg will do. Our daughter when a young teen learned this early on, had some noresthisterone in stock and regulated her periods when needed herself, no doc needed (just me to write her a script).