The pregnancy is now properly established. Inside the blastocyst, different groups of cells develop, which will eventually form the different parts of the baby. The inner cells will grow to become lungs, stomach and intestines, a middle layer will be muscles and bones, and an outer layer will form the nerves and skin.
Its time for the blastocyst to have another new name. It’s now an embryo. The end of the second week is about day 28 of your menstrual cycle – that means your period is due. And at this stage, depending on whether or not you wanted to get pregnant, you’re likely to start getting nervous and worried, or hopeful and excited. Because your period is late.
From a couple of days before your period was due, pregnancy hormone starts getting into your urine. So as soon as your period is late, you can do a pregnancy test.