Bean at 5 weeks - 1-7 March

I immediately called Dr. Puzey on Monday morning who confirmed that I was probably 5 weeks pregnant and set up an appointment for about 8 weeks - 26 March - I can't wait. Still no symptoms but hard to keep it quiet at work. Want to shout it from the rooftops but will wait till 12 weeks.


Your baby is about the size of a sesame seed, and he looks more like a tiny tadpole than a human. The big development this week: Your baby's brain is beginning to grow! It develops from the neural tube (a structure that will also spawn your baby's spinal cord, nerves, and backbone). If you've heard the recommendation to take folic acid to prevent neural tube defects, you can see why it's so important. Your baby is now made up of three layers — the ectoderm, mesoderm, and endoderm — that will later form his organs and tissues. Your baby's neural tube develops in the top layer, called the ectoderm. This layer will also give rise to his skin, hair, nails, tooth enamel, and mammary and sweat glands. His heart and circulatory system begin to form in the middle layer, or mesoderm. The mesoderm will also form your baby's muscles, cartilage, bone, and subcutaneous (under skin) tissue. The third layer, or endoderm, will give rise to his lungs, intestines, and rudimentary urinary system, as well as his thyroid, liver, and pancreas. In the meantime, the primitive placenta and umbilical cord, which deliver nourishment and oxygen to your baby, are already on the job.