M
moxie08
Guest
I thought everyone would appreciate hearing some analysis from published research (sample: 136 women who became pregnant) into implantation times and HCG rates of increase during the first week post-implantation. Rather than post the science bits, I'll summarize a few key points. If you want more information please PM me. I have no affiliation with this research.
Implantation occurs for most of the women between 6 to 12 days after ovulation.
(1) Nearly all the women took at least 3 days before HCG levels were at a level that could be identified via an hpt. Many more took at least 6. Some of the women took up to two weeks!
The rate of increase (for the first week after implantation) varied considerably -- meaning that some were punctuated -- aka increased in jumps, some started slow and then rose quickly, and some increased evenly. This means you may see your lines slowly get darker or you may get lots of
and suddenly a 
!!
Women who implanted earlier had HCG that increased faster than women who implanted later. This means that if you have been patiently seeing throughout your TWW, you may need to be even more patient. ;-)
(2) Only 40% of the women implanted by 7 dpo. Considering what I mentioned in (1), this means only 40% of women know their by 10 dpo!! This doesn't even include those of the 40% of the women who have slower or jumpier curves. So it's not hard to imagine that at 10 dpo, most pregnant women won't see a line yet.
Speaking of 10 dpo, only 68% of the women had implanted by that time. This increases to 90% by the day of expected menstruation, which still raises the point that those women still have 3-6 days before they get their .
And just so those last 10% of the women aren't left out -- it won't be until 24 dpo until the last of them even start to see the kind of HCG levels required for a !!! 
Time of implantation isn't an indicator of the final outcome, either, so those that see lines at 10dpo or earlier won't be sitting superior to those that have waited. Women who miscarried had a variety of implantation days and rates of HCG increase.
Here is an image from another similar piece of research which shows even more conservative times for implantation relative to ovulation. You are looking at several example lines from real women, plus a small table listing implantation by 'dpo' for all the women in the study. Each line/woman begins with the earliest possible detection of hcg -- tiny levels -- which doesn't necessarily mean day of implantation. But for the purposes of discussion we may as well assume it is that day.
https://farm3.static.flickr.com/2452/3632764816_fe59bf2485_o.jpg
The green line means HCG levels high enough to be visible on the most sensitive of hpt (10 mIU/mL). By counting the dots on each woman's line, you can see it takes approximately 4 to 6 days post implantation to reach HCG levels high enough to test.
Happy to answer any questions, but keep in mind I am not a physician nor am I an expert, especially regarding your cycle!
Implantation occurs for most of the women between 6 to 12 days after ovulation.
(1) Nearly all the women took at least 3 days before HCG levels were at a level that could be identified via an hpt. Many more took at least 6. Some of the women took up to two weeks!
The rate of increase (for the first week after implantation) varied considerably -- meaning that some were punctuated -- aka increased in jumps, some started slow and then rose quickly, and some increased evenly. This means you may see your lines slowly get darker or you may get lots of
and suddenly a !!Women who implanted earlier had HCG that increased faster than women who implanted later. This means that if you have been patiently seeing
throughout your TWW, you may need to be even more patient. ;-)(2) Only 40% of the women implanted by 7 dpo. Considering what I mentioned in (1), this means only 40% of women know their
by 10 dpo!! This doesn't even include those of the 40% of the women who have slower or jumpier curves. So it's not hard to imagine that at 10 dpo, most pregnant women won't see a line yet.Speaking of 10 dpo, only 68% of the women had implanted by that time. This increases to 90% by the day of expected menstruation, which still raises the point that those women still have 3-6 days before they get their
.And just so those last 10% of the women aren't left out -- it won't be until 24 dpo until the last of them even start to see the kind of HCG levels required for a
!!! Time of implantation isn't an indicator of the final outcome, either, so those that see lines at 10dpo or earlier won't be sitting superior to those that have waited. Women who miscarried had a variety of implantation days and rates of HCG increase.
Here is an image from another similar piece of research which shows even more conservative times for implantation relative to ovulation. You are looking at several example lines from real women, plus a small table listing implantation by 'dpo' for all the women in the study. Each line/woman begins with the earliest possible detection of hcg -- tiny levels -- which doesn't necessarily mean day of implantation. But for the purposes of discussion we may as well assume it is that day.
https://farm3.static.flickr.com/2452/3632764816_fe59bf2485_o.jpg
The green line means HCG levels high enough to be visible on the most sensitive of hpt (10 mIU/mL). By counting the dots on each woman's line, you can see it takes approximately 4 to 6 days post implantation to reach HCG levels high enough to test.
Happy to answer any questions, but keep in mind I am not a physician nor am I an expert, especially regarding your cycle!
hasn't turned up yet, and Ive not felt quite right for the last week or so. My (.)(.) and nipples are sore, and Ive had the feeling for the last week that the 
xx
