Accuracy of dating sonograms

19 Feb

Could the birth control not have worked in Jan, the embryo lived through the withdrawal bleeding, and the fetus has continued to measure small throughout the pregnancy? According to this period date, the most likely date of conception would be around 14 days after the period, that is around the 19th of February.Ultrasound has intrinsic error of upto maximum 5 - 7 days, so the probable dates of sex would have been a week before or after the 19th of February, but in NO WAY as early as January 18th.According to my most recent due date, that would mean I conceived 10 or 11 days after intercourse.

However, conception doesn't actually occur until around 14 days after your LMP, or later if your cycle is longer than 28 days. The rhetoric of "natural" in natural childbirth: childbearing women's perspectives on prolonged pregnancy and induction of labour.

An image of your fetus will appear on an accompanying computer screen and while looking at this image, the technician will take some standard measurements from different angles and listen for a heartbeat.

Don't worry: This type of exam is painless and risk-free, and seeing your baby for the first time will likely be an enjoyable experience.

I went in for a follow-up today and they are saying my due date is now June 24. We were not trying to get pregnant and had unprotected sex only once that month, and I know within a day or two when that happened.

When I went in for an almost 20 week ultrasound, I measured 2 weeks behind.