FYI:
Week 1 After fertilization, the sperm and ovum nuclei fuse to form a zygote. This starts to divide as it travels to the uterus.
Week 2 After 6 or 7 days, the cell mass develops a hollow cavity and is now called a blastocyst. By the tenth day it becomes embeded in the endometrium
Week 3 The blastocyst is the size of a pinhead but is multiplying fast. The inner cells of the cavity develop into the embryo.
Week 4 The baby is about 2mm (1/16 in) in length and weighs less than 1gm (3/100 oz).
It body tissues are forming from three embryonic layers: the hair, nails, mammary glands, teeth enamel,
inner ear and lenses for the eyes from one layer; the nervous system, retina, pituitary gland, muscle,
cartilage, bones, blood and lymph cells from another; and lungs, trachea, liver, pancreas and bladder fr a third.
Week 5 The heat has started to develop; it now has four chambers. The roof palate of the mouth is forming
Week 6 The cluster of cells is becoming an embryo, roughtly the size of a fingertip.
The heart is beating at 180 beats a minute, more than twice as fast as yours.
Eyelids, ears, and the beginnings of hands and feet are forming. The shape of the head and the curve of the spine are discernible.
Week 7 The embryo has quadrupled in size and the nervous system is developing well.
The baby is staring to move its body, arms and legs. These movements can be detected by a monitor, but you will not be
able to feel them. The lungs, liver and kidneys are starting to develop.
Week 8 About 2.5cm (1 in) in length, the embryo has now evolved into a foetus. Its brain is developing rapidly, and the umbilical cord has formed.
Ears are beginning to develop and the mouth is able to open and close
Week 9 The baby is now 4cm (1 1/2 in) in length and can wriggles slightly. The digestive and nervous systems are developing fast and the brain
is four times larger than it was four weeks ago.
Week 10 The nervous system has matured enough for the baby to move about more. All the organs plus the sack of amniotic fluid have been formed
and the baby is now recognizable as a human being.
Week 11 The liver takes over the manufacture of red blood cells and the kidneys are functioning. The baby is about 5cm (2in) long and growing repidly.
It has a completely formed face. The head is growing to accommadate the brain.
Week 12 Your baby is fully formed, althought at just 6cm (2 1/2in) long, there is a lot of gowing still to do. Its nails and hair are starting to grow, its jaw has 32
little teeth buds, and it sis starting to suck. Internal sex organs have formed.