Baby development at 2 weeks of gestation
It's very interesting fact, but from week 2, the organs and major body systems-respiratory, digestive, nervous-develop rapidly.
This is a very critical period, when the embryo is most vulnerable to destructive influences. I saw a figure in my medical book that explains when birth defects occur-mostly at week 2-3, such as central nervous system, heart, ears. Defects that occur later in pregnancy are likely to be less serious. And..because pregnancy is calculated from the date of your last period, you are already one month pregnant!