That little sucker slaps on to the walls of my Uterus. It is about the size of a grain of rice and I start feeling like crap.
Development of the central nervous system (brain and spinal cord).
The baby is now known as an embryo. It is around 3 mm in length. By this stage, it is secreting special hormones that prevent the mother from having a menstrual period.
The heart is now in service! The embryo has developed its placenta and amniotic sac. The placenta is burrowing into the uterine wall to access oxygen and nutrients from the mother’s bloodstream.
The embryo is now around 1.3 cm in length. The rapidly growing spinal cord looks like a tail. The head is disproportionately large
The eyes, mouth and tongue are forming. The tiny muscles allow the embryo to start moving about. Blood cells are being made by the embryo’s liver.
The embryo is now known as a fetus and is about 2.5 cm in length. All of the bodily organs are formed. The hands and feet, which previously looked like nubs or paddles, are now evolving fingers and toes. The brain is active and has brain waves.
Teeth are budding inside the gums. The tiny heart is developing further.
The fetus can swim about quite vigorously. It is now more than 7 cm in length.
The eyelids are fused over the fully developed eyes. The baby can now silently cry, since it has vocal cords. It may even start sucking its thumb. The fingers and toes are growing nails.
The fetus is around 14 cm in length. Eyelashes and eyebrows have appeared, and the tongue has tastebuds
The fetus is around 21 cm in length. The ears are fully functioning and can hear muffled sounds from the outside world. The fingertips have prints.
The fetus is around 33 cm in length. The fused eyelids now separate into upper and lower lids, enabling the baby to open and shut its eyes. The skin is covered in lanugo and protected by the vernix.
Your baby now weighs about 1 kg or 2 lb 2oz and measures about 25 cm from crown to rump. The crown-to-toe length is around 37 cm. The growing body has caught up with the large head and the baby now seems more in proportion.
The baby is around 46 cm in length. It has probably nestled its head into its mother’s pelvis, ready for birth. If it is born now, its chances for survival are excellent. Development of the lungs is rapid over the next few weeks.
Baby is around 51 cm and is ready to be squeezed out.