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Fertilization occurs when the sperm and egg meet, join and begin to divide. Medically, "conception" does not occur until implantation. So we actually "conceive" about a week after BD or ovulation. That is also when the forming cells first become an embryo. It can take 4-8 days to travel through the tubes. It can take 2-3 days for implantation once it reaches the uterus - until the eggs fully embeds into the uterine lining. Its during this time that we will possibly get a positive hpt (very sensitive) because HCG levels first appear. A chemical pregnancy occurs when implantation is not fully successful. This can occur if the egg is not ready or viable, or if the lining is not thick enough or capable of holding the fertilized egg. My doctor believes this happened to me. I had a high enough HCG to get a definite positive on an HPT, but by the time I got bloodwork (next day) it was <5 and AF arrived the next day - actually on time. Had I not done the HPT at that very moment, I probably would have never known. So many chemical pregnancies occur before conception is complete.
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I am wondering if the high percentage of m/c is maybe due to the shorter tubes. Usually the fertilization takes place in the tube and starts to grow in the tube for the first 5 days or so. If it travels down the tube too quickly then it will not be able to implant correctly due to the fact that it has not gotten to the maturity that it needs to be at the time of implantation. When it does not implant it is a chemical pregnancy. Conseption occured, but did not get as far as it needs to go. This is just my understanding of it. If someone else has more information or a different understanding I would be curious to know more. God Bless!!! Heather
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it really depends on just HOW short your tubes are after TR. It generally takes about 4-6 days for the fertilized egg to make it's way down the tube, and begin implantation. With really, really short tubes, thou it could be a little sooner.
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How long will It take for Implantation to take place now that we have all had tubal reversals done? Is it the same as before TL? I was wondering since we have shorter tubes now.