Premenstrual syndrome causes several symptoms that very closely resemble those of early on pregnancy. As a result, some women have challenge determining if they space pregnant or if their period is about to start.

You are watching: Heightened sense of smell before period

Symptoms the both premenstrual syndrome (PMS) and also pregnancy have the right to vary from person to person, yet they often include tenderness in the breasts, cramping, and changes in mood.

In this article, us compare the symptoms of PMS v those of early pregnancy and explore the differences in between the two.

Share on PinterestStomach cramps can be a symptom of both PMS and early pregnancy.
Feeling irritable, anxious, or sad, or having crying spells, are common in both beforehand pregnancy and also the days leading up to a period.

These symptoms of PMS frequently disappear as soon as menstruation begins. However, if mood transforms persist and also a human being misses your period, this may indicate pregnancy.

Persistent feel of sadness have the right to indicate depression. View a physician if low moods last for 2 mainly or more.

About 10 percent of pregnant women worldwide experience a mental health condition, depression being the most common.


Hormonal alters are a common cause of constipation in women. The fluctuations deserve to slow under bowel movements.

Research suggests that constipation affects approximately 38 percent that women throughout pregnancy, yet it also affects numerous women just prior to their periods.

Pregnant women room most likely to have constipation in the an initial two trimesters, while women with PMS-related bowel problems frequently experience relief after their periods begin.

Breast pain and also tenderness

Breast changes are a common symptom the both PMS and early pregnancy. The alters can include:

paintendernessswellingheavinesssensitivitybumpy breast tissue

The severity of these symptoms varies among individuals.

However, in world with PMS, breast-related symptoms room usually most far-reaching just prior to a menstrual period, and also they generally get much better during the period or just after it ends.

In at an early stage pregnancy, the breasts might feel an especially tender to the touch, and they frequently get heavier. The area roughly the nipple might sting or feel sore. Part women likewise develop an ext noticeable blue veins near the surface ar of the breasts.

Breast symptoms throughout pregnancy begin 1 or 2 weeks after ~ conception and may persist until childbirth.


The hormone progesterone contributes come tiredness and fatigue before a period. Fatigue generally goes away as soon as the duration begins.

For ladies with hefty periods, too much tiredness deserve to last transparent the period. The may additionally be a sign of iron-deficiency anemia.

Fatigue is also a usual symptom of early pregnancy. It frequently persists transparent the very first trimester, and some ladies feel worn down for the full 9 months. Difficulty sleeping and also frequent night urination have the right to make pregnancy tiredness worse.

Bleeding or spotting

Light spotting or bleeding can happen in early pregnancy. This is referred to as implantation bleeding, and also it commonly occurs 10–14 days after fertilization.

Many women carry out not endure implantation bleeding. Others might not notice it. It is lot lighter 보다 menstruation.

PMS does not typically cause spotting, back a duration can be really light on the first day. Usually, term bleeding lasts for 4 or 5 days, and also it causes more far-ranging blood loss 보다 the spotting of implantation.


Cramping is common in both PMS and early pregnancy. Beforehand pregnancy mouse are comparable to term cramps, but they can take place lower under in the stomach.

These cramps may persist for weeks or months throughout pregnancy, as the embryo implants and the uterus stretches.

Headaches and back pain

Hormonal transforms can reason both headaches and ago pain in at an early stage pregnancy and before the term period.

Changes in appetite

Share on PinterestChanges in hormones may cause women to crave sweet foods prior to their period.
Increased appetite and food cravings are usual symptoms that pregnancy, however they can additionally occur through PMS.

Many world with PMS experience enhanced appetite and cravings because that sweet or fat foods, or carbohydrate-rich meals. Changes in the hormone estrogen and progesterone likely influence cravings just prior to a period.

Research shows that 50–90 percent of pregnant females in the united States have cravings.

Many crave specific foods and have aversions come others, detect their sight or odor deeply unpleasant. Food aversions are much less common in people with PMS.

Some pregnant women crave non-food items, such as ice or dirt. The medical term for this phenomenon is pica. Anyone v pica should speak to a doctor.

Some symptoms are an ext likely come indicate early on pregnancy 보다 an unavoidable period. However, a person deserve to only be certain by acquisition a residence pregnancy check or visiting a doctor.

Symptoms that room likelier come signal pregnancy include:

A missed period

Missing a period is among the most obvious signs that pregnancy. If a period is 1 mainly late and pregnancy is a possibility, take it a pregnancy test.

Many exam are highly sensitive and also can detect pregnancy hormones number of days prior to a missed period.

However, there have the right to be countless other reasons for a missed or late period, such as:

polycystic ovary syndrome


While mild digestive discomfort can happen just before a term period, nausea and also vomiting space not usual PMS symptoms.

They are, however, usual symptoms of early pregnancy. Nausea affects up to 80 percent the pregnant women. Nausea and vomiting generally start prior to the ninth week of pregnancy.

Typically, this symptoms subside by the second trimester, but some women experience nausea transparent pregnancy.

Nipple changes

Although breast alters can occur throughout both PMS and pregnancy, changes to the nipples rarely happen prior to a period.

See more: How Do You Get Rid Of Brain Freeze, Explained By Ben & Jerry'S

If the areola, the colored area around the nipple, gets darker or larger, this can suggest pregnancy. These alters can happen as early as 1 or 2 weeks after ~ conception.