How Can Sex Jump Start Your Period?

If you’re trying to get your period for a big event, or just want it to come on sooner, there are some things you can try. Exercise, relaxation techniques, and even orgasm can help your uterus start shedding its lining.

But sex can’t jump start your period if it’s already close to the time you usually get your period. Here’s why.


During orgasm, your body becomes sexually excited and feels pleasure in your genitals and other areas. The feeling lasts a few seconds and it feels good. During this time, your heart rate and breathing speed up, blood pressure increases, and muscles throughout the body spasm. It can happen while masturbating or during sex with a partner, but it can also occur when ejaculation occurs.

If you are squeamish, consider wearing a menstrual cup or tampon while having sex during your period. This can make things less messy and more comfortable. Plus, it may help reduce cramps since your uterus will contract to push out the blood.

Orgasm can sometimes jump start your period if you have it at the exact point where your period is due. This is because your uterus can contract to “force some of that blood out,” gynecologist Leah Millheiser told INSIDER. But, she adds, it’s only if you are within a day or two of starting your period.

Sex itself doesn’t change your period but arousal can, especially if it leads to an orgasm. However, even if you don’t have an orgasm, sex can delay your period by about a day because it causes your hormone levels to surge. This can cause your womb lining to thicken and an egg to be released before the prostaglandin that starts your period is produced.

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Hormonal Changes

The hormonal changes that take place during sex are one of the reasons people sometimes get their period earlier than usual. During sex, your body releases oxytocin, adrenaline, dopamine, and other chemicals that can encourage fluctuations in hormones that are required for the menstrual cycle to begin. These chemicals can also help relieve symptoms of premenstrual syndrome, like cramps and moodiness. During orgasm, your pelvic floor muscles contract rhythmically, which can also lead to increased blood flow to the uterus.

If you’re not wishing for your period to start or aren’t close to the day when you normally get it, then this extra blood may just be leftover from your last period or even an old cyst (it could also be from a vaginal infection or rare gynecological cancers). Bleeding after sex is usually caused by friction of your vulva against clothing or bedding and can happen anytime.

Semen can also make your period come on early because it can soften the cervix. However, this is only if you and your partner are in a monogamous relationship and using reliable birth control. If you do this, make sure to use condoms or a diaphragm to prevent pregnancy. Otherwise, sex can only slightly speed up your period. If you’re already on your period or are close to getting it, it won’t affect your timing at all.

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Blood Flow

Sometimes, if you’re not expecting it, you might get your period earlier than normal. This can be due to a few different reasons. One way that this can happen is if you have orgasms, as it can make your uterus contract and push out some blood. This is also why it’s important to use condoms when you have sex, to protect yourself from sexually transmitted infections (STIs).

Another way that a period can start early is if you have the last dregs of your previous uterine lining left over. This can be a result of having sex, as it can cause your body to expel that lining, even if you’re not having anal or vaginal sex.

Lastly, you may be bleeding because of a cervical polyp or other non-cancerous growth on your cervix. This is why it’s important to see your doctor if you experience any unusual bleeding, especially if it happens frequently or is severe.

Ultimately, sex can only jump start your period to a certain extent, and only if you’re in the follicular phase of your menstrual cycle. Otherwise, it won’t do much to change the length of your menstrual cycle. If you’re concerned about your menstrual cycle, it can be helpful to talk to a doctor or track your period with an app like Flo.

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Research has shown that stress can affect a woman’s menstrual cycle. Whether it’s emotional, mental or physical, any type of stress can cause irregular periods. Fortunately, once the stress passes, your period will resume its normal schedule. Some women find that yoga, journaling and spending time with friends and loved ones can help reduce stress levels.

If you’re looking to conceive, then it might be helpful to keep your stress levels low to help get your period back on track. High levels of stress can throw off your hypothalamus, which regulates your hormones and your period. This can be especially true if you have a medical condition like polycystic ovary syndrome (PCOS), which can cause irregular periods.

Although sex can jump start your period, it’s not always guaranteed to do so. Sometimes, it takes a little extra work to bring on your period, like orgasm. This combination of hormonal changes and uterine contractions can dilate the cervix and prompt your body to shed your old lining and prepare for a new one. If you want to ensure that sex does the trick, try having a few orgasms before trying to make your period happen again.

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