If you were 13 weeks on 18 December you conceived on or around October 2nd.
i would go with what the ultrasound says as it is almost 100% accurate.
No. Your due date is calculated from two weeks before actual conception. You are actually pregnant for 38 weeks. You conceived 18 weeks ago.
That means it is the date conceived (or within 48 hours of). It is never right on, but within a week of. Go by what the ultrasound says. No, if your ultrasound says 17 weeks and 2 days that would be that date plus 2 extra weeks, that is around the time of your last period, unless you have irregular periods or conceived straight after a miscarriage or something. The length of pregnancy is always measured from your last period even by ultrasound.
There would be no gestational sac visible @ 3 weeks. YES At 5 weeks 3 days pregnant by ultrasound, you conceived 3 weeks 3 days earlier.
It depends if you were five weeks pregnant or five weeks from conception. If five weeks pregnant you conceived around 18 May, if five weeks from conception you conceived around 4 May. If you could see a heartbeat you were 5 weeks from conception.
Yes, that would be typical, but it depends on the usual length and predictability of your cycle.
At this stage, yes the ultrasound can be off by 10 days. Mine was off by ten days the other way, that is I thought I was 18 weeks and the ultrasound said 16 and a half. I knew when I had conceived because my husband had been away on a trip.
At 7 weeks an ultrasound is accurate within 2 or 3 days. At 20 weeks it is accurate within 5-7 days.
Doctors measure pregnancy from the first day of your last period, but you don't conceive until two weeks after that. Your baby was conceived 3 weeks ago.
If you know when you conceived you should always go by your date. Ultrasounds, especially later in pregnancy, are not as accurate. Here are the dates that they can be off. The inaccuracy of ultrasound First trimester: 7 days 14 - 20 weeks: 10 days 21 - 30 weeks: 14 days 31 - 42 weeks: 21 days
Approximate age of the foetus on November 27th 2009 is 14 weeks.
Ultrasound scans are given at roughly between 16 and 22 weeks. More can be scheduled if there is a problem.
Most women deliver between 37-40 weeks after conception
It means it is approximately four weeks since you conceived, but six weeks since the start of your last period. Pregnancies are dated from the latter date, so you wouldn't say you were four weeks pregnant.
the answer is the 18th of September.
September 14th to November 23rd is 9weeks and 2 days approximately or 2months and 12days
If your ultrasound says you are 4.5 weeks pregnant you conceived 2.5 weeks ago. Historically pregnancy is counted from the first day of the last period although of course you don't actually conceive until (on average) 2 weeks later.
You might can, but don't be alarmed if you don't. You may think that you are 8 weeks and really only be 6 or 7. There is no way to tell when you conceived.
Possibly as early as 6 weeks but generally between 10 and 14 weeks.Edit: I'm assuming you mean an ultrasound during pregnancy. You can have ultrasounds for other things.
The doctor can estimate about how many weeks along the pregnancy is through methods such as ultrasound, but he cannot say with 100% certainty what the exact date was.
Counting from today (30th September), you conceived on roughly 31st August
You conceived 19 weeks and 4 days ago. Look at a calendar and count back 19 weeks and 4 days. You probably need two calendars now, for 2008 and 2007.
When you have a dating ultrasound you are given an EDD (estimated date of delivery) If you count back 40 weeks from this date it should be about when your last period was. If you do not have a regular cycle they may not correlate exactly. 38weeks back from your EDD is approximately when you conceived.