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
the probability of pregnancy


Overall (during the luteal phase)
experiencing this symptom
the probability of pregnancy




About this symptom


Implantation bleeding or spotting is a normal pregnancy symptom and may occur from 6-12 days after conception. Many women do not experience this symptom at all. Each woman who does will experience it very differently - Some will spot lightly for a couple of hours, while others may have some light spotting for a few days. If the bleeding occurs after the expected period, it is usually not attributed to implantation. Studies show that anywhere from 20-30% of women experience some degree of bleeding in early pregnancy. Approximately half of pregnant women who bleed will go on to have a normal, healthy pregnancy. Be sure to contact your physician if you experience heavy bleeding or bleeding accompanied by painful cramping, or if you feel the bleeding is not "normal".


Summary of chart

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

0 dpo - 4 dpo

Decreases probability of pregnancy

5 dpo - 9 dpo

Slightly decreases probability of pregnancy

10 dpo

Decreases probability of pregnancy

11 dpo - 18 dpo

Significantly decreases proabability of pregnancy


Detailed breakdown by DPO

Shows data for days where differences are meaningful.

Day past ovulationPregnant vs non-pregnant
0 dpo 1.5 times less (-33%)
1 dpo 1.7 times less (-38%)
2 dpo 1.5 times less (-29%)
3 dpo 1.4 times less (-26%)
4 dpo 1.5 times less (-29%)
5 dpo 1.3 times less (-23%)
6 dpo 1.2 times less (-16%)
7 dpo 1.2 times less (-14%)
9 dpo 1.3 times less (-20%)
10 dpo 1.5 times less (-33%)
11 dpo 1.8 times less (-42%)
12 dpo 2 times less (-48%)
13 dpo 2.2 times less (-53%)
14 dpo 2.3 times less (-57%)
15 dpo 2.3 times less (-56%)
16 dpo 2.1 times less (-52%)
17 dpo 1.9 times less (-46%)
18 dpo 1.7 times less (-41%)
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.

Ladychey123  2 years ago
Yesterday I was spotting (10dpo) I’m 11dpo today.

OhBoyOrGirl  3 years ago
8 or 9dpo spotted for a few hours, only brown blood. No cramping or pms feeling! Nothing since earlier Af due in week

maryjane1616  5 years ago
11 dpo, got some mucus with some brownish blood in it for about 2 days. Period should arrive in a week, any ideas?

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