Note: Information provided on this page is for general education only, growth of baby inside womb depends upon many factors and growth of your baby may differ slightly than indicated below, please seek medical advice whenever in doubt.

In this week ...

• The fertilized egg known as a zygote is implanted in the wall of the uterus and the placenta and umbilical cord begins to form.
• This week your baby is the size of a full-stop, or a poppy seed. It is still barely visible to naked eye.
• In this week there is a lot of organization and cell separation in progress and three distinct layers of cells start to form viz. the ectoderm (outer layer), mesoderm (middle layer), and endoderm (inner layer).
• Ectoderm, the outer layer, will eventually become the baby's skin, eyes, hair, their nervous system, their brain, and even the enamel of their teeth.
• Mesoderm, the middle layer will become their skeleton, muscles and kidneys, tissues and vascular (blood) system.
• Endoderm, the layer on the inside will eventually become their internal organs.
• Once a cell has a specific function, it can't become a different type of cell. Every one is pre-programmed from the start and knows what to do and what it is to become.
• Towards the end of this week and into next week, a transvaginal ultrasound can show a gestational sac. Yolk sac that helps feed your baby until the placenta is fully functional.
• Baby will grow to average length of about 0.1 inch or 2.5 mm Crown to Rump (CR) towards the ends of this week.