Hot Flashes

Early pregnancy symptom

The chart

Comparison of how often this symptom is experienced by pregnant vs non-pregnant women.


After implantation (9 dpo+)
experiencing this symptom
does not impact
the probability of pregnancy


Overall (during the luteal phase)
experiencing this symptom
does not impact
the probability of pregnancy




About this symptom

Hot Flashes

Hot flashes, characterized as an intense heat that typically starts in the neck and face and can be accompanied by sweating and increased heart rate, are very common in early pregnancy. They can last from a few seconds to several minutes but are generally not a cause for concern. Hormonal fluctuations and increased blood flow can cause hot flashes even in very early pregnancy, and some women report this as one of the first symptoms they experience.


Summary of chart

An explanation of the affect on the probability of pregnancy for each day past ovulation or group of days.

0 dpo - 3 dpo

Slightly decreases probability of pregnancy

4 dpo - 16 dpo

Does not significantly affect probability of pregnancy

17 dpo - 18 dpo

Slightly decreases probability of pregnancy


Detailed breakdown by DPO

Shows data for days where differences are meaningful.

Day past ovulationPregnant vs non-pregnant
0 dpo 1.2 times less (-17%)
1 dpo 1.2 times less (-15%)
2 dpo 1.2 times less (-14%)
18 dpo 1.3 times less (-17%)
Understanding the data

Pregnant women experience this symptom the number of times listed as often as non-pregnant. The percentage listed refers to the percentage increase or decrease between pregnant and non-pregnant.

Visit the dpo chart pages to view most common and significant positive and negative indicators of pregnancy for each day past ovulation.




What women are saying about this symptom.

Mamatobesoon111  3 years ago
Today I’m on 11 dpo, having night sweats and all-day-long hot flashes since 3 dpo, together with mood swings/anxiety

Ohhicutiexo  3 years ago
8 dpo today having hot flashes since O! I never get them and im always yawning tired my boobs are heavier as well

Francobaby90  5 years ago
Had major hot flash last night at 12dpo, only in face area. Which is totally weird for me. Fingers crossed for a positive soon.

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