2006-07-18 10:23:03 · 5 answers · asked by Anonymous in Pregnancy & Parenting ➔ Pregnancy
Well if you did not know your exact day of your last period they will base it completely off of your sonogram or ultrasound which bases the dates off of the size of the baby so if the fetus is a little larger than normal it would a few days to a few weeks longer then what it may actually be. So your baby just may be larger then expected.
2006-07-18 10:30:12 · answer #1 · answered by Tara S 4 · 0⤊ 0⤋
They calculate by the first date of your last period so....when the dr says you are 15 weeks he is going by the first day of your last period. You most likely conceived 2 weeks after. So you conceived 13 weeks ago but you are 15 weeks. Basically, they add two weeks. I know it sounds really confusing. Im not sure why they dont just start at time of conception but they dont. Hope this isnt too confusing.
2006-07-18 17:29:19 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I think you saying your 15 weeks from your last period, and 13 weeks from day of conception. Im 5 and 3 weeks, do you get it now?
2006-07-18 17:29:41 · answer #3 · answered by MissSmartt 2 · 0⤊ 0⤋
The count begins 2 weeks before the start of your missed period becuase that is when most women are most fertile and more than likely that is when you got pregnant. Hope this helps.
2006-07-18 17:27:21 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Ask your doc to explain it to you...
If you weren't cheating, or got pregnant earlier and didnt' know it, then there's got to be a logical explanation- such as the little grey men with the big black eyes whom I mentioned the last time you asked this. :)
I'm sure there's nothing to worry about though. Relax. :)
2006-07-18 17:32:29 · answer #5 · answered by Falcon_01 6 · 0⤊ 0⤋