Your baby is about the size of an apple pip - 3mm...
Growth is now largely focused on your baby's head, which is starting to develop much more rapidly than the rest of the tiny body. This is because the brain is undergoing some very crucial and rapid development in order to effectively regulate the heart rate, blood circulation, and other vital functions.
Your baby's heart is now made up of two tiny heart tubes, which are already beating.
Also, although tiny, what were simple limb buds last week are limb flippers this week.
Your body is still adjusting to the increased amount of hormones and you are probably experiencing more of the same early pregnancy symptoms as last week. If you haven't already experienced morning sickness, you may find that it starts now. Don't be surprised if you start to feel exhausted this week. Your body is working very hard building a life support system (the placenta) for your baby.
You may notice changes in your areolas (the dark area around your nipple). The sebaceous glands on the areolas also become raised, nodular and pink. You will probably find that your breasts feel firmer and have larger veins than usual, running close to the surface of the skin. Your breasts may tingle and you may even experience occasional stabbing pains.
Things for you to consider during week 5 of your pregnancy:
What to expect at week 6 of your pregnancy...