Photo dating scan
Crown/rump length and gestational age are closely compared with each other until around the end of the first trimester.The ideal time for a sonographer to assess the gestational age in the first trimester is between 7-10 weeks of pregnancy.
He or she will then move a hand-held transducer over your belly, which bounces high-frequency sound waves off your baby to create a picture on the monitor.Not all units offer an early scan if all is going well in this pregnancy, though.Ask your GP if you want the reassurance of an early scan. The scan's main purpose is to work out accurately how many weeks pregnant you are and estimate your due date.At around seven weeks of pregnancy, it’s reasonably common for women to have their first ultrasound.This can be for many reasons but the most common is to confirm pregnancy and to check that the embryo is viable and “everything’s ok”.For most mums-to-be, the first scan will be a dating scan at between 10 weeks and 13 weeks plus six days of pregnancy.
However, the timing of your first scan will also depend on how your pregnancy is going, and where you live.
So you can see all his organs, muscles, limbs and bones are in place, and the sex organs are well developed.
The 12 week scan is usually just about determining whether your baby is healthy and growing as it should be.
Although the sex organs are well developed, it's usually too soon to see them at 12 weeks.
Some people believe in nub theory, which suggests you can determine the gender of your baby from that first ultrasound photo. We know how exciting/terrifying the whole thing is, but too much anxiety and you’ll be jumping off the bed as soon as the gel touches your belly (it’s very cold).
I had to drink so much bloody water before my scan only to find there was a delay before my appointment – I felt like I was going to explode.