By the end of pregnancy week 5, your baby's organs would have started to develop, says KK Women's and Children's Hospital (KKH).
Forming a human being from mere cells takes a lot of development and planning.
The weeks to come is a sensitive period where cells are telling one other where to go, and mapping out who's forming what. This process is called organogenesis.
The slightest defect can result in a malformation.
Sometimes, the error margins are too wide and this is not compatible with life. In such cases, the embryo will cease to develop and an early miscarriage would occur.
Mere cells are aligning themselves and obtaining symmetry.
One end will develop into the head, while the other gives rise to the tail end.
Pregnancy Week 5: Organ development begins!
By the end of pregnancy week 5, the beginnings of organ development would have taken place. It starts with 3 special layers of tissue called germ layers.
They are the:
Each layer will develop into a certain set of organs.
ectoderm is the outermost layer and will become the outermost
The middle layer, or
mesoderm will give rise to parts of the body such as the
deeper layer of skin, bones, muscles, as well as the circulatory (including the
The innermost layer, known also as the
endoderm, grows into most of the
digestive tract (stomach, liver, pancreas, intestines),
urinary system and
By pregnancy week 10, all organ systems would have been formed, albeit immature and not fully functional.