Ultrasound Question Amp Due Date

2 Replies
HollyB - November 16

On 13 November, I had my first OB appointment. The Dr. performed an ultrasound which showed the baby as 7 Weeks 4 days. My last menstruation was 9 September. I am concerned since the Dr. decided to change my due date from 15 June to 27 June. Does this sound right? When I type in my last menstruation on some of the baby sites, it comes back with a different due date but states the baby is the same age as the ultrasound. I am confused on why there is a 2 week difference on my Due date.

 

Grandpa Viv - November 16

There may be a mix up on the ultrasound. The age of the fetus can be given from last period or from conception. Your Sept 9 menses ties in with conception around Sept 22 and a fetal age of 7 weeks 4 days on Nov 13. Alternatively, you may have ovulated a couple of weeks late that month. Good luck!

 

Gemini_Girl - November 17

Hi, first of all they go by your last period date but if the baby is measuring, at least a week either way, they will change your due date based on your u/s, same happened to me at my first u/s my due date changed from Jan 26th to Feb 7th, I think its quite common for this to happen

 

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