Montgomery's Tubercles
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
Montgomery's Tubercles
Within the first few weeks after conception many women may notice tiny bumps on the areolas. These are Montgomery’s tubercles and are not a cause for concern. They are always present but may become more obvious during pregnancy. They are tiny glands that secrete a type of oil to help protect and lubricate the skin around the nipple during breastfeeding. Some also believe the odour of the oil may stimulate the appetite of the newborn. The number of glands varies between women from only 4 to 20 or more.
Includes: Changes in the small bumps around the areolas. These are always present but they become much more apparent during pregnancy.
Summary of chart
An explanation of the affect on the probability of pregnancy for each day past ovulation or group of days.
0 dpo - 1 dpo
Slightly decreases probability of pregnancy
2 dpo
Does not significantly affect probability of pregnancy
3 dpo - 6 dpo
Slightly increases probability of pregnancy
7 dpo - 8 dpo
Does not significantly affect probability of pregnancy
9 dpo - 11 dpo
Slightly decreases probability of pregnancy
12 dpo - 14 dpo
Does not significantly affect probability of pregnancy
15 dpo - 18 dpo
Slightly increases probability of pregnancy
Detailed breakdown by DPO
Shows data for days where differences are meaningful.
| Day past ovulation | Pregnant vs non-pregnant |
|---|---|
| 0 dpo | 1.3 times less (-20%) |
| 1 dpo | 1.3 times less (-22%) |
| 3 dpo | 1.3 times more (+27%) |
| 4 dpo | 1.3 times more (+21%) |
| 10 dpo | 1.2 times less (-15%) |
| 11 dpo | 1.2 times less (-14%) |
| 17 dpo | 1.2 times more (+16%) |
| 18 dpo | 1.2 times more (+15%) |
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.
Guest 7 years ago
9 dpo and noticed this morning
MamaGamer86 7 years ago
I am approximately 9 DPO and I have these on my right nipples
Alishacolin. 7 years ago
Oily nipples and colostrum in my right breast, 9dpo, still negative pregnancy test but still super early, cramping like crazyy
