7 weeks : Center for higher intelligence begin to develop!


Your baby is just about a size of a blackberry, measuring around half of an inch. It might be experiencing a series of overall dynamic development in all the organs.

Nervous System:

  • Its nervous system begin to become more specialized with the onset of development of cerebral hemispheres, which are considered as  the Centre for higher Intelligence.
  • The cranial nerves (except olfactory and optic) are developed.
  • The development of Pituitary gland initiate the foetal production of hormones.

Heart –

It matures and divide into Atria and Ventricle.

  • Lungs buds along with its inner respiratory linings begin to develop.
  • In liver, the hepatic glands and vascular channels grow and it begins to produce Red Blood cells to carry oxygen in your baby, until the bone marrow takes over the production.
  • The Mesonephrons develop. They would form the kidneys and excretory system.
  • The upper and lower limb buds continue to grow, with development of slightly webbed fingers and toes.

The primary sense organs begin to develop:

1- Eye –

The development of lens placode, which would give rise to lens. The Retinal pigment that would help in color differentiation.

2- Ear –

Development of auditory vesicles that would give rise to the vestibular and auditory system of inner ear that would subsequently help in body equilibrium and hearing.

3- Nose –

Development of Nasal placode, that would give rise to olfactory epithelium with the sense of smell.

4- Skin –

Your baby’s skin is presently paper thin and transclucent with underneath veins clearly visible.

5- Mouth –

The pharangeal arches have begin to develop, that would give rise to future mouth, pharynx, tongue, teeth and palate.

You may now experience Morning sickness, lethargy, weakness, mood swings and irritability due to hormonal changes. The nature has make suffer from these symptoms so that you take adequate rest and baby remains safe in womb.


The information is shared to create awareness towards Pregnancy and Childcare to reduce maternal and child deaths. At most care has been taken by the author to include the verified information from authentic sources. However, kindly discuss the same with your health care provider before implementation.