Ultrasound dating pregnancy
Remember that the due date is only an estimate of when you will deliver your baby.
The chances of actually having your baby on that exact date are very slim. Luckily, there are ways to figure out your due date when you can’t remember the first day of your LMP: The second half of a woman’s menstrual cycle always lasts for 14 days.
People don't always ovulate at the same times.
I didn't have sex after January started yet the doctors say I'm 14 weeks and the baby is measuring 14 weeks.
With all of my babies including this one, they changed my due date after the first ultrasound.
I'm short so maybe the baby is a little short too? All I know is they keep saying my due date is October 3rd or 5th or something and I keep saying the baby is coming out between September 22nd and September 27th at the latest.