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.
No. Your due date is calculated from two weeks before actual conception. You are actually pregnant for 38 weeks. You conceived 18 weeks ago.
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.
You can't. Either you got pregnant after having had sex earlier, or the ultrasound operator is wrong.
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.
Around 2.5 weeks ago.
If you were 13 weeks on 18 December you conceived on or around October 2nd.
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
Subtract fourteen weeks (7 days x 14) from the date of the ultrasound.
You could see a heartbeat if they do a transvaginal ultrasound.
The only sure way of knowing you are pregnant with twins is by ultrasound. An ultrasound at 8 weeks would show if you were carrying a multiple pregnancy.
If you just found out that you are 11 weeks and 5 days pregnant you would have conceived approximately 11 weeks and 5 days ago
Most women deliver between 37-40 weeks after conception