Originally Posted by porkpie1981

When Is a Woman Pregnant?
To be sure, not every act of intercourse results in a pregnancy. First, ovulation (i.e., the monthly release of a woman's egg) must occur. Then, the egg must be fertilized. Fertilization describes the process by which a single sperm gradually penetrates the layers of an egg to form a new cell ("zygote"). This usually occurs in the fallopian tubes and can take up to 24 hours. There is only a short window during which an egg can be fertilized. If fertilization does not occur during that time, the egg dissolves and then hormonal changes trigger menstruation; however, if fertilization does occur, the zygote divides and differentiates into a "preembryo" while being carried down the fallopian tube toward the uterus. Implantation of the preembryo in the uterine lining begins about five days after fertilization. Implantation can be completed as early as eight days or as late as 18 days after fertilization, but usually takes about 14 days. Between one-third and one-half of all fertilized eggs never fully implant. A pregnancy is considered to be established only after implantation is complete.



http://www.guttmacher.org/pubs/tgr/08/2/gr080207.html

Originally Posted by porkpie1981

How long does it take for fertilization to occur?
Fertilization occurs within 24 hours after ovulation.


How long does it take for implantation to occur?
Implantation occurs about 5-10 days after ovulation.


How soon can I take my Pregnancy Test (Beta HCG or Home Pregnancy Test)?
The earliest that a sensitive blood test can pick up any HCG at all is 5-7 days after ovulation. Your quantitative serum beta test can be reliable about 10-12 days after ovulation, if you have not taken a HCG booster. Extremely sensitive home pregnancy tests might in some cases be reliable as soon as 12 dpo. If you have taken a HCG booster, then you may have a reliable test at 14 days past ovulation. The serum beta is the most reliable test. Any level over a 5 is generally considered a positive result, although having a second blood test two days later should show the numbers nearly doubling. The "average" level of hCG is about 25 at 10 dpo, 50 at 12 dpo, and 100 at 14 dpo. Note that there is a difference between a qualitative and a quantitative test. A qualitative test gives a yes or no answer. Your HCG level has to be above 50 units to get a positive result. Quantitative tests give a value to the amount of pregnancy hormone in your blood. It gives a specific number. Anything greater than 5 is considered positive. Considering that it is possible to implant as late as 10 dpo, a qualitative beta might produce a false negative if used for an early pregnancy test.


Mmmmm im thinking im 16dpo but i suppose its an average

Originally Posted by Connorsmom612

I just found my HCG results from my first pregnancy and my beta level was at 180 mL and this was 11 days after was due! So I would have been 25 DPO at that point so there is still some hope out there! was due for me today and she hasn't showed her face yet...keep ur fingers crossed for me!