Wednesday, November 5, 2008

Out and a little down

So I have yet to get my period but have little hope that I am pregnant. I expect to start this afternoon. I tested this morning with the hope that I could have been pregnant but had not produced enough hcg to test positive yesterday. Alas not so much. I was holding out hope that since I have a short luteal phase (11 days) that I would test positive later. The early pregnancy tests say that you can test up to four days before your missed period. This is assuming a 28 day cycle and ovulation at day 14. I have a 30 day cycle and ovulated at day 20 (+opk on cd19). According to my understanding of human reproductive biology (which is limited) if I had fertilized an egg it should have implanted and thus started to produce hcg on day 8piui. In an "average" woman's cycle that would would be cycle day 22 of 28 and would give a woman 6 days to produce hcg before missing a period. In my case day 8piui is 28 of 30 day cycle. Which only gives me 2 days to produce hcg before missing a period. So if a pregnancy test is only can detect hcg 4 days before a missed period or on day 24 of 28 then it takes about 2 days from implantation to build up enough hcg in the urine to get a positive test. So my question is this... do I still have hope? I guess I am grasping at biochemistry at this point but I still want to hang onto hope at least till I start to bleed. Sorry for this brain dump. It has been floating around in my noggin and I just had to let it out. I am generally not this obsessive but this baby making thing has pushed me over the edge.
On another note I am very much looking forward to welcoming eggy II to the conversation. One of my good friends told me this morning that I should be a little sad today but that I have a new cycle to look forward to and that she always looks forward to her fresh start each month. It made me feel much more hopeful this morning. So back to fertility friend and data collection for the two of us (which we both love more than is normal, I guess that is what you get with a math teach and a science teacher) Thanks Elysha!
Also thanks to "all" our readers. Your support makes it all a whole lot better!


Meegs said...

Remember: The "days before your missed period" thing is based on a 14 day LP. So if you have a 14day LP, there may be a slight chance you could get your + test on 9dpo.

HOWEVER, if you have a short LP, that does not mean you would get a +HPT sooner. Implantation still occurs between 7-10dpo no matter how long or short your LP may be. If you don't implant until 10dpo - you wont have enough hcg in your urine for a +HPT for a couple more days.

Meaning, your LP may be only 10 days long, but you may get negative tests until like 13 or 14dpo. AKA... you're not technically out until your period arrives.

Good luck hun!

Meegs said...


days past conception/ovulation (DPO) and hCG in mIU/mL (for average singleton pregnancy)

7 days 0 - 5
14 days 3 - 426
21 days 18 - 7,340

Most sensitive test detect as low as 25 mIU/mL... meaning even at 14 days you could be below that and be pregnant.

And as a general rule:
HPT Accuracy Results Percentages: (Based on a 25mIU sensitive test)
10 dpo : 35%
11 dpo : 51%
12 dpo : 62%
13 dpo : 68%
14 dpo : 74%
15 dpo : 80%
16 dpo : 88%
17 dpo : 92%

So, I say wait 5 more days (right? That would be 16dpo?) and if no period still... test again.

SupersammyG said...

thanks meegs. That is what I was thinking. Glad to see that a. you followed my very wordy post and b. I was understanding the process. I hang my biomajor head in shame. Though I know much more about the reproduction of frogs if anyone needs that info. No period still I get to obsess some more!

Snickollet said...

Hey, SSG--

I've been thinking of you a lot and talking with Shazam at work, hoping for the best for Eggy I and, if need be, Eggy II. Should I bring a batch of my ultra-awesome chocolate-chip cookies for you? They will either be comforting if this round is not a YES or nourishing if Eggy I needs some calories.

PS: Did Shazam fill you in on my Monday "Is it a date? Is it not a date?" event? Bottom line: the jury is still out.

SupersammyG said...

Shazam didn't tell me! I need details. Also cookies are always welcome! Thanks for thinking of us. ssg

Anonymous said...

It's still early. If you O late and have a short LP ask for progesterone supps next time around.They will keep AF away until eggy can do it's thing. Keeping my fingers crossed for you!