Baby measuring a week small....

Allison • Pregnant with baby #2💗

So our newest edition is measuring a week small. Supposed to measure 18 and 2, but measuring 17 and 2. But healthy baby and weighs what she should at 18 weeks. How many of y’all had this happen? Did they change your due date? Also it kinda looks like a boy parts not girl to me in the photo. Doesn’t really look like our daughters gender sono pic when I was pregnant with her