Fetal Development Week by Week – Week 2
At the beginning of week 2 the egg implants into the uterine wall. Even though you are just becoming pregnant by fertilization you are considered two weeks pregnant at this time.
Typically the egg will implant into the upper portion of the uterus. The placenta will begin to form and prepare to provide blood and nutrients to the baby during the pregnancy. The embryo is getting ready to begin splitting apart and become separate parts of the anatomy. By this point the sex of your baby has already been determined and other defining characteristics such as eye and hair color.
Etopic pregnancies can occur at this time. Often an etopic pregnancy will go unnoticed for several weeks, up to 16 weeks, at times. If it is caught early enough it can be handled without invasive surgery.
Although you won’t know for several weeks, fraternal or identical twins would begin at this point. Fraternal twins (or other multiples) result from more than one fertilized egg implanting. Identical twins result from a single egg splitting into two identical parts and starting to grow separately.
An amazing process has begun and soon, you will find out you are pregnant!