At a glance
- Crying more happens in both PMS and early pregnancy, driven by shifting estrogen and progesterone.
- PMS crying eases within days of your period starting. Pregnancy crying doesn't, since there's no period due to end it.
- A missed period, new nausea, or breast tenderness that won't ease point more toward pregnancy than PMS.
- If your period is late, a home test beats guessing from symptoms alone.
Strength of evidence
Limited evidence
No study directly tests crying as a way to tell PMS from early pregnancy. Guidelines describe the two conditions separately, so timing, accompanying symptoms and a pregnancy test remain the most reliable ways to tell them apart (ISPMD consensus, 2016).
| Compared on | PMS crying | Pregnancy crying |
|---|---|---|
| When it starts | One to two weeks before your period, in the luteal phase | Can start within the first couple of weeks after conception, often before a missed period |
| What eases it | Eases within a few days of your period starting | Doesn't ease with bleeding, since there's no period due |
| Other signs | Bloating, breast tenderness and irritability that fade with your period | Nausea, breast tenderness that doesn't fade, and a missed period |
| Pattern | Repeats in roughly the same way most cycles | A new pattern that doesn't match your usual premenstrual week |
| What confirms it | Symptoms ease once bleeding starts | A positive pregnancy test |
Is crying a sign of PMS or pregnancy?
Yes, crying more than usual can point to either one. Hormones drive both patterns: estrogen and progesterone fall sharply in the week before your period, and early pregnancy brings a fast rise in estrogen and hCG. Both shifts touch the brain chemistry that keeps mood steady, which is why a sad commercial or a snippy text can suddenly feel much bigger than it should.
Timing is what separates them:
- PMS crying usually eases within a few days of your period starting.
- Pregnancy crying doesn't ease that way, because there's no period due to end it, and it tends to come with signs that build rather than fade, like nausea or breast tenderness that doesn't let up.
If you're trying to work out which pattern fits you right now, PMS or pregnant? How to tell the difference goes through the fuller picture beyond crying alone.
Where this sits in your cycle
PMS window The week before your period
How does PMS crying differ from pregnancy crying?
PMS crying tends to show up in a predictable window, the days right before bleeding, often alongside irritability or a shorter fuse than usual. It settles once your period arrives, typically within a day or two.
Pregnancy crying doesn't follow your usual premenstrual week. It can start earlier or later than you'd expect, and it sticks around instead of lifting with bleeding, since there's no period to measure it against.
A few other tells:
| PMS crying | Pregnancy crying | |
|---|---|---|
| Pattern | Repeats the same way most months, tied to your own cycle | A new pattern, not tied to your usual cycle |
| Other signs | None beyond your usual premenstrual symptoms | Often comes with a missed period, new nausea, or breast tenderness that doesn't ease |
| What stops it | Calms once bleeding starts | Doesn't stop with bleeding, since pregnancy hormones keep climbing instead of dropping |
For more on why premenstrual tears happen at all, see crying before your period: why it happens and what helps.
When does pregnancy crying usually start?
Early pregnancy hormones move fast. Estrogen and human chorionic gonadotropin, or hCG, start climbing within days of implantation, often before you'd even expect a missed period. Some women notice sudden tears or mood swings in that first week or two. Others don't notice anything different until weeks later, if at all.
That early timing is part of why pregnancy crying can feel confusing set against a normal premenstrual week. When does PMS start? covers the usual window, which is one to two weeks before bleeding for most people.
If your tears started earlier than they normally would for you, or feel different in kind and not just intensity, that's worth noticing. It's a reasonable cue to consider a test rather than wait out your usual premenstrual pattern and see if it passes on its own.
What other signs help you tell?
Crying alone won't settle it. A handful of other signs shift the odds toward pregnancy rather than PMS:
- A missed period, or one that's late by more than a few days.
- Breast tenderness that doesn't ease once bleeding would normally start.
- Nausea, especially in the morning, which isn't typical of PMS.
- Fatigue that feels heavier than your usual premenstrual tiredness.
- New sensitivity to smells or food aversions you haven't had before.
None of these confirm pregnancy on their own, and some overlap with ordinary PMS. Symptoms a week before your period: what's normal lists what's typical for PMS, so you have a baseline to compare against.
Your history matters too, especially if you do become pregnant. Premenstrual mood patterns are worth mentioning to whoever cares for you during pregnancy, since they can carry forward into that time and beyond.
When should you take a test?
If your period is late, testing is the fastest way to know, faster than tracking symptoms alone.
- Wait until the day your period is due, or a day or two after. Home tests read most reliably once you're late.
- Test first thing in the morning, with your first urine, when hCG is most concentrated.
- If it's negative but your period still hasn't come in a few days, test again.
- If you get a positive result, a GP or gynecologist can confirm it and talk through next steps.
If you'd rather compare your symptoms side by side first, PMS or pregnant? A symptom quiz walks through the same signs this page covers, one question at a time.
From the research library
Research on low mood
1,946 studies in the library look at low mood in PMS and PMDD. They were published from 1964 to 2026, and each one has a short summary of what was tested and found.
1,946
studies, 1964 to 2026
How strong the studies are
- Strong study design
- 161
- Moderate study design
- 660
- Early or limited evidence
- 1,125
Cohort study, 2026
What genetic factors are linked to premenstrual symptoms?
One genetic location on chromosome 12 was clearly associated with PMS. The genetic factors linked to PMS are also linked to depression.
Strong study design
Systematic review, 2026
How often do mood disorders and PMS or PMDD occur together?
Very often. Between 42% and 49% of women have both PMS or PMDD and a mood disorder at the same time, depending on which condition was diagnosed first.
Strong study design
Systematic review, 2026
Does continuous paroxetine or birth control work better for PMDD?
Both antidepressants and birth control pills are effective for PMDD. Continuous paroxetine (an antidepressant) and DROS/EE 24/4 (a specific birth control) showed the strongest effects in studies reviewed, though the evidence comes from relatively few studies.
Strong study design
Randomised trial, 2026
Does Kundalini Reiki help reduce PMS symptoms and improve quality of life?
Yes, according to this rigorous double-blind study. Nursing students receiving Kundalini Reiki showed significantly greater improvements in PMS symptoms and quality of life compared to those who received placebo.
Strong study design
Cohort study, 2026
Does having PMS before pregnancy increase the risk of postpartum depression?
Yes. Women with a PMS history were 45 percent more likely to develop postpartum depression within one year after birth, with 5.4 percent of women with PMS developing it compared to 3.8 percent without PMS.
Strong study design
Systematic review, 2026
Does vitamin D supplementation help PMS symptoms?
Vitamin D reduced overall PMS severity and particularly helped with physical symptoms and depression, but the certainty of this evidence is very low. We cannot be confident in these findings yet and more high-quality research is needed.
Strong study design
Questions people ask
Does crying before your period mean I'm not pregnant?+
No. Crying before your period doesn't rule pregnancy in or out, since both involve shifting hormones that affect mood. The clearer signal is timing: PMS crying eases within days of your period starting, while pregnancy crying continues because there's no period due to end it.
How soon can pregnancy affect your mood?+
Pregnancy hormones, mainly estrogen and hCG, start rising within days of implantation, often before a missed period. Some women notice crying or mood swings in the first week or two of pregnancy, while others notice nothing unusual until weeks later, if at all.
Can PMS crying happen even if your period is still days away?+
Yes. PMS crying typically starts one to two weeks before bleeding, as estrogen and progesterone fall. If crying starts well outside that window, or feels different from your usual premenstrual pattern, that's a reasonable cue to consider a pregnancy test instead of waiting it out.
What if crying before my period happens every month and feels extreme?+
A pattern of severe mood symptoms that returns every cycle and eases once bleeding starts can fit premenstrual dysphoric disorder, which affects about 3.2% of women and girls when confirmed by daily tracking (Reilly et al., 2024). If this takes a week of every month, see a GP or gynecologist and bring two months of daily notes.
Sources
- 1.Risk factors of postpartum depression and depressive symptoms: umbrella review of current evidence from systematic reviews and meta-analyses of observational studies, The British journal of psychiatry : the journal of mental science, 2022
- 2.The prevalence of premenstrual dysphoric disorder: Systematic review and meta-analysis, Journal of affective disorders, 2024
- 3.Fourth consensus of the International Society for Premenstrual Disorders (ISPMD): auditable standards for diagnosis and management of premenstrual disorder, Archives of women's mental health, 2016