4 Weeks Pregnant...
You're 4 weeks pregnant and your baby is about 0.014 - 0.04 inches in length and weighs less than 1 gram. It's been 2 weeks since fertilization and this is the week you would of had your period.
Now is the time to take a home pregnancy test, you should receive a positive result.
The fertilized egg has finally made its seven to ten day trip down into the uterus, where it will implant into the endometrial lining.
During this trip it has divided into two parts: the first part is forming the placenta and the second part will become the embryo.
The two layers that make up the amniotic sac are newly formed, and the very beginning of the umbilical cord -- has appeared. Until your placenta is fully functioning, the yolk sac will feed your baby.
The embryo now has three main brain sections: the fore brain (for memory and reasoning), middle brain (for translating messages from the brain to organs and limbs) and the hind brain (for regulating breathing and muscle movement).
Germ layers are developing into specialized parts in your baby's body: the ectoderm, endoderm and the mesoderm. The ectoderm will become the skin, hair and the brain. The endoderm will develop into the lining of the liver, pancreas, thyroid and the gastrointestinal tract. Finally, the mesoderm will develop the muscles, skeleton, blood system and connective tissue.
Parts of the eye are visible and the beginning of a mouth with a tongue is noticeable. Lung buds are now forming and the heart is pretty large, with well established circulation.
The buds that will become arms and legs are becoming visible and the first thin layer of skin is formed.
Remember to take extra good care of yourself, these initial weeks are some of the most important weeks in your baby's physical and mental development.
No more Aunt Flow!!
For the next 8 more months anyway...