If your period is late or you want it to arrive before a specific date, there are a few approaches that may help, depending on your situation. Some work only if you’re already close to the start of your cycle, while others require a prescription. The most important first step: if there’s any chance you could be pregnant, take a test before trying anything on this list.
Rule Out Pregnancy First
A late period is one of the earliest signs of pregnancy, and several methods used to bring on a period can be harmful during pregnancy. Home pregnancy tests vary widely in how well they work on the first day of a missed period. The most sensitive brand on the market (First Response Early Result) detects over 95% of pregnancies at that point, but many other brands catch 16% or fewer. If your period is only a day or two late, use a high-sensitivity test, or wait a few more days and retest with any brand for a more reliable result.
Orgasm and Uterine Contractions
If your period is already due or just a day or two away, orgasm (from sex or masturbation) may give it a nudge. During orgasm, your body releases oxytocin, a hormone that triggers uterine contractions. Those contractions can help your uterus start shedding its lining if it was already preparing to do so. The physical stimulation of orgasm also causes muscular movements in the uterus that work alongside that oxytocin surge.
This isn’t going to bring on a period that’s a week away. It works best when your body is already on the edge of menstruating and just needs a small push. Think of it as moving the timeline by hours, not days.
Exercise and Stress Reduction
Chronic stress raises cortisol levels, which can delay ovulation and push your period back. If stress is the reason your period is late, anything that lowers your stress response (moderate exercise, better sleep, breathing exercises) may allow your cycle to resume on its own. This won’t produce overnight results, but it addresses one of the most common reasons periods arrive late in the first place.
Exercise specifically increases blood flow to the pelvic area and can promote mild uterine contractions. A brisk walk, yoga, or light cardio may help if your period is imminent. Intense exercise, on the other hand, can have the opposite effect. Overtraining is a well-known cause of missed or delayed periods because it signals to your body that conditions aren’t ideal for reproduction.
Vitamin C
Vitamin C is sometimes recommended as a natural way to bring on a period. The proposed mechanism is that it interferes with progesterone, the hormone that maintains your uterine lining. When progesterone drops, your lining sheds and your period begins. In theory, high doses of vitamin C could accelerate that progesterone decline.
The evidence for this is limited and mostly anecdotal. There are no large clinical trials confirming it works reliably for period induction. If you want to try it, stick to doses under 2,000 mg per day (the tolerable upper limit for adults). Higher amounts can cause nausea, diarrhea, and stomach cramps.
Parsley Tea: Proceed With Caution
Parsley has a long history of use as a traditional remedy for bringing on menstruation. It contains a compound called apiol, which stimulates uterine contractions. The problem is that the line between an effective dose and a dangerous one is thin. Toxicology data shows that parsley apiol taken daily for several consecutive days has caused serious harm, including liver damage and death in documented cases. The lowest daily dose that induced abortion in recorded cases was 0.9 grams of apiol taken for eight days, but fatal outcomes have occurred at doses not far above that.
A cup or two of mild parsley tea made from fresh leaves is unlikely to contain enough apiol to be dangerous. Concentrated parsley oil or apiol supplements are a different story entirely and should be avoided. This is one area where the “natural” label gives a false sense of safety.
Adjusting Birth Control Pills
If you’re on combination birth control pills and want your period to come at a different time, you can manipulate when your withdrawal bleed happens by adjusting your pill schedule. The standard approach, according to Mayo Clinic, is to skip the inactive (placebo) pills in your pack and start a new pack immediately if you want to delay your period.
To make your period come sooner, you can stop taking active pills earlier than usual and switch to your placebo pills (or simply stop taking pills for a few days). Your withdrawal bleed will typically start within two to three days of stopping the active pills. This doesn’t work with every type of birth control, so check with your prescriber if you’re on a progestin-only pill, patch, or ring, since those follow different rules.
Prescription Progesterone for Late Periods
If your period is significantly late and you’re not pregnant, a doctor can prescribe progesterone tablets to trigger a withdrawal bleed. The standard protocol uses 10 mg daily for 10 days. After you stop taking the medication, bleeding typically starts within three to seven days. This is the most reliable non-surgical method for inducing a period and is commonly used when periods have been absent for weeks or months.
This approach works by mimicking the natural progesterone rise and fall of a normal cycle. Your body builds up the uterine lining in response to the progesterone, then sheds it once the hormone is withdrawn. It doesn’t fix the underlying reason your period is late, but it does confirm that your uterus and hormones can respond normally, which gives your doctor useful diagnostic information.
When a Late Period Signals Something Else
A period that’s a few days late is usually nothing to worry about. Stress, travel, illness, weight changes, and sleep disruptions can all shift your cycle. But the American Society for Reproductive Medicine defines secondary amenorrhea as the absence of periods for more than three months in someone who previously had regular cycles, or six months in someone with irregular cycles. At that threshold, investigation is warranted.
Common causes of prolonged missed periods include polycystic ovary syndrome (PCOS), thyroid disorders, excessive exercise, very low body weight, and high prolactin levels. Each of these has its own treatment path, and bringing on a single withdrawal bleed with progesterone doesn’t address the root issue. If your periods have been absent or unpredictable for several months, the goal should be figuring out why, not just forcing a bleed.