Maybe it just depends on baby Per my reproductive doctor and ultrasound done in the first trimester is the most accurate for dating conception and figuring out estimated due date! My doctor says the first ones are the most accurate because the further along (like at 20 weeks) genetics come into play so we're sticking with the June 1st date.
In this episode of the podcast, Penny has a rant about one of her pet peeves – the ever changing due date – and gives lots of tips on how to determine the estimated due date (EDD) with the greatest accuracy.
Having a scan in the first few months of pregnancy can be a thrilling experience.
I'm still breastfeeding and my first postpartum period was august 21 - august 27, 2014.
Then I did not have a period or spotting whatsoever in September then I test positive for pregnancy on October 11th and the early ultrasound gave me my due date of June 22nd meaning I would have gotten pregnant around september 29th or within days later. Ultrasound at 10 weeks dated me at June 1st although my due date according to lmp is June 11th. My sons consistently measured 2 weeks ahead until the third trimester where he's matching up with the lmp due date.
I'm just curious if this has changed at all since they started more first trimester ultrasounds.
(2nd baby) my due date changed a lot because each ultrasound said something way off.
Do you think that due dates have become more accurate since it's more common now to do first trimester dating ultrasounds?
I know that historically it's always been calculated based on your LMP and that it's rare for babies to come on their due dates.
Before 5.5 weeks a small fluid sac may be seen in the uterus without sign of a fetus or a fetal heart beat.
In these situations a repeat scan one to two weeks later may be necessary to confirm a viable pregnancy and provide accurate dating.
In these early weeks of pregnancy, your baby is too small and low in your abdomen to be picked up by an abdominal ultrasound scan.