Inaccurate gestational age due to longer cycles?

A.

Hi ladies!

My cycles are typically 31-35 days long with ovulation on CD 21-23.

Initially the doctor’s office will base gestational age on LMP. But have you been told baby was measuring smaller when compared to your LMP date by your first ultrasound?

If so, how much smaller was baby measuring for you? Days? Weeks?

Both of my babies have always measured over a week smaller on the initial ultrasound so just curious if others have experienced the same thing.💕