It depends on when your U/S was done. I had an U/S to date my last pregnancy, because I was not having periods due to birth control. My baby was small for gestational age and so the U/S showed him due later than he actually was. BY over 3 weeks. An ultrasound done before 12 weeks is accurate to within 2 or 3 days. After that it becomes less and less accurate as your pregnancy progresses as obviously some babies grow bigger and faster than others.
i doubt it they are usually pretty spot on
Yes it is still possible but it reduces the chances of it occurring
No, the egg will be to small to detect
It is kind of hard to tell until you get your ultrasound. But you can Google pregnancy calculators and it can help you determine the date of conception by entering in some information (such as when your last period was, possible days of intercourse etc.)
If your period started on December 1 and lasted until December 6, you likely ovulated around December 15, assuming a typical 28-day cycle. If your ultrasound indicates you are 9 weeks pregnant, that would place your conception around December 15, making your estimated due date around September 24. The 9 weeks of pregnancy typically counts from the first day of your last menstrual period (December 1), not the conception date.
Very unlikely.
Somewhere between 3rd and 9th December 2005.
Ultrasound can visualize fetus inside with no errors.
One can find a conception calculator on the "BabyMed" website. The BabyMed conception calculator and reverse pregnancy due date calculator helps you find the possible conception date retrospectively. Just enter your due date, and the pregnancy conception date calculator will calculate the exact possible dates when you got pregnant.
Diet does not affect the gender of your baby. The gender of your baby is determined at conception (when the sperm fertilizes the egg), although it is several months after conception before and ultrasound can visibly "see" the genitalia of the baby.
Possible date of conception, 3rd to 11th October.
Well, that is something that an ultrasound will have to determine. The theory is that you are pregnant (conception has occurred) sometime after your last period. Conception doesn't necessarily occur the moment that the man ejaculates his sperm into the vagina. So, yes, you did become pregnant somewhere between when you had sex after your last period, but before you realized that you were late in getting your period. This has to be discovered by the ultrasound, to determine the EDD (estimated due date).