Headache
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
decreases
the probability of pregnancy
Overall (during the luteal phase)
experiencing this symptom
decreases
the probability of pregnancy
About this symptom
Headache
Headaches in pregnancy tend to occur most frequently in the first trimester. Hormone levels rise dramatically in early pregnancy, and can contribute to headaches. Changes in your blood circulation and blood volume during pregnancy can cause increased pressure on your blood vessels. This increase requires greater fluid intake to counteract dehydration, which can be another cause of headaches. Be sure to get at least 8 glasses of water a day.
Low blood sugar could also be the culprit, be sure to eat a healthy well balanced diet, with adequate protein and iron intakes. Avoid foods that can trigger a headache: like chocolate, MSG, cheese and spicy foods. Other possibilities are stress and anxiety or not getting enough rest. Try to take time each day to relax and make sure you get enough sleep.
Summary of chart
An explanation of the affect on the probability of pregnancy for each day past ovulation or group of days.
0 dpo - 15 dpo
Slightly decreases probability of pregnancy
16 dpo - 18 dpo
Decreases probability of pregnancy
Detailed breakdown by DPO
Shows data for days where differences are meaningful.
| Day past ovulation | Pregnant vs non-pregnant |
|---|---|
| 0 dpo | 1.2 times less (-14%) |
| 7 dpo | 1.2 times less (-14%) |
| 8 dpo | 1.2 times less (-15%) |
| 9 dpo | 1.2 times less (-16%) |
| 10 dpo | 1.3 times less (-18%) |
| 11 dpo | 1.3 times less (-20%) |
| 12 dpo | 1.3 times less (-21%) |
| 13 dpo | 1.3 times less (-23%) |
| 14 dpo | 1.3 times less (-20%) |
| 15 dpo | 1.3 times less (-20%) |
| 16 dpo | 1.4 times less (-25%) |
| 17 dpo | 1.4 times less (-29%) |
| 18 dpo | 1.5 times less (-32%) |
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.
Comments
What women are saying about this symptom.
desichvw 6 weeks ago
Don’t compare so hard to this. I’ve had a bfp since 9dpo. I had an appointment yesterday at 11dpo & they confirmed. My head is killing me!
MamaShaOC 1 year ago
Headaches were one of my first symptoms with both of my sons
OhBoyOrGirl 3 years ago
Had a headache since yesterday when I woke up, on 9dpo on 10dpo I still have a headache. Never really get them! Xx
