While the mother adapts physiologically to sustain a life within her, her child goes through astounding growth from a cluster of cells to an amazing baby with beating heart, facial features and kicking legs – all in a span of 40 weeks.
One of the most significant change in a pregnant woman is weight gain, which comes mainly from the phenomenal increase in the volume of body fluid to protect the baby in her womb. A healthy weight woman puts on an average of 11.5 to 16kg during pregnancy(1). Besides the weight of the baby, she also gains weight from the increase of blood, about 30 to 50% or 1.5 to 2 litres more to transport oxygen and nutrients to her developing baby(2).
With the increase of blood volume, her heart needs to work harder to pump it throughout the body, so her resting heart rate would increase correspondingly to about 10 to 20 more beats per minute(2). She would also need about 20% more oxygen for both herself and the developing baby(3), and her breathing rate increases as well.
With the increase of blood volume, her heart needs to work harder to pump it throughout the body, so her resting heart rate would increase correspondingly to about 10 to 20 more beats per minute(2). She would also need about 20% more oxygen for both herself and the developing baby(3), and her breathing rate increases as well.
Within her womb, the baby is developing astoundingly. At 4 weeks, the little one has transformed from a group of cells into an embryo, which is the size of a poppy seed – 10,000 times bigger than the size at conception(4). At the same time, her 3 primary brain parts are formed(5). By week 6 to 7, her heart starts beating at a regular rhythm(6), which is twice faster than an adult(7). She can even feel touches by week 8(8).
Fast-forward to week 10, her facial features become more distinct(6) and can have different facial expressions and even smile in the following week(9). By week 26, the baby’s unique fingerprints have developed(6). Around 4 to 5 months, her heart pumps more than 28 litres of blood a day(9).
Fast-forward to week 10, her facial features become more distinct(6) and can have different facial expressions and even smile in the following week(9). By week 26, the baby’s unique fingerprints have developed(6). Around 4 to 5 months, her heart pumps more than 28 litres of blood a day(9).



















