I am pregnant! I am 5.6 weeks since LMP. Gestational sac measures 5mm. How far along am I?

Question

I had a Transvaginal Ultrasound today and the gestational sac measured 5mm. Last week I also had a T.U. and we could not see a thing so I know we are moving in the right direction. Doctor confirmed it is NOT ectopic, YAY!!! He also scheduled an appointment for 2 weeks and states that is when he will tell me my due date. I am so curious... Am I to disregard initial due date based on LMP? This is my 4th pregnancy.I have a 10 year old and a 6 six year old with a miss in between. This is a new Dr. and he does a T.U. every visit for the first 12 weeks. This process is new to me.

Answer 1

You would be 5.6 weeks pregnant...At least, I would assume that. but if he said that he would tell you your due date maybe not...

Answer 2

Congrats to you!

To figure out the gestational age using the gestational sac"

"Gestational Sac: Gestational age = 4 weeks plus (mean sac diameter in mm x days). This relies on the growth of the normal gestational sac of 1 mm per day after the 4th week of gestation. For example, a gestational sac measuring 11 mm would be approximately 5 weeks and 4 days gestational age. (4 weeks plus 11 days = 5 weeks and 4 days)."

So for you, 4 weeks + 5 days = 4W5D

You would not see the fetal pole at this point, and you may not see the yolk sac.  Check out the website I have provided...it has good info on first trimester ultrasound scans.  Best wishes!

http://www.obgyn.ufl.edu/obgyn101/Ultras...