You aren’t pregnant yet, but your estimated due date is calculated according to the first day of your last period. This is considered week 1 of pregnancy.

Ovulation may occur this week. Believe it or not, your baby still hasn’t actually been conceived, although you are still technically pregnant.

Conception takes place in your fallopian tubes this week and the two cells that unite start dividing and growing rapidly.

The rapidly-growing embryo is dividing into inner and outer clusters and doubles in size every single day at this stage.

You may still not even know you’re pregnant, but the cells that will form Baby’s brain, vital organs, and digestive system have all formed.

By now, Baby is about 4mm long, and you can see him or her with the naked eye. You may even be able to hear a heartbeat.

Baby almost doubles in length, and the brain, which is the first organ to develop, grows by 25%. Leg buds also emerge this week.

This is a big week for Baby’s development. Baby is essentially a complete human being at this stage, although still tiny!

Baby may double in size this week, as the cartilage skeleton begins to be replaced by bone cells. Baby’s toes also start developing.

Baby’s heart is fully developed; it now has all four chambers, and it beats between 120 and 140 beats per minute!

Tiny fingernails start forming this week. Baby’s head also becomes rounder and is now almost half of Baby’s entire body size.

Baby can scrunch his little face, and all organs and systems found in a newborn are now present. Baby’s fingers and toes are all fully formed.

You’ve made it to the second trimester! Baby will now start changing posture, stretching and exercising their arm and leg muscles.

Baby now has his or her own set of unique fingerprints and will respond to bright light through your abdominal wall.

Baby’s individual footprints start forming on the soles of their feet this week! Baby may change position often, but you still won’t be able to feel this.

By now, you may be able to identify Baby’s gender on sonar! Baby also starts growing hair, and tiny eyelashes start developing.

Baby’s muscles become increasingly strong is he or she moves about. Some women can feel this, but mostly you won’t feel Baby’s movements just yet.

By now you may be able to pick up on your baby’s sleep patterns. If you’re having a little girl, her ovaries will have already formed millions of eggs!

Baby’s head circumference is about 16.4cm, and he or she will now begin to open and close their eyelids which have been closed since about Week 10!

Baby, who has now reached about half his or her birth length, may begin to move whenever they hear your voice, Mom!

Baby’s eye movement now becomes more sophisticated – his or her eyes can dart about or scan slowly. Baby may grasp and touch the umbilical cord often.

It’s around this stage that you may start to feel Baby’s movement. At first, it may feel like little bubbles or butterflies in your belly.

Baby now weighs about 450g and is covered in fine silky body hair called lanugo. This hair helps protect Baby is the womb.

Baby’s eyes are now structurally complete and light-sensitive, and he or she will blink when they’re startled by loud noises!

By now you should feel about 10 periods of movement a day, but these could still be quite gentle for another few weeks.

Baby has now grown teeny little toenails and can nod and shake his or her head. Baby’s sense of smell also starts developing.

Baby weighs about 1kg now and is 32cm long! He or she may start somersaulting in your womb, too – can you feel it?

Baby can now smell some scents that you do, Mom, and they’re able to tell the difference between sweet and sour tastes.

Baby now weighs about 1,2kg. Every day, billions of neurons are being formed in Baby’s brain and central nervous system.

This week, why not try to feel for Baby’s head through your belly? It will feel like a firm, smooth, rounded surface.

The inner ear organs that help Baby to balance are now mature enough for Baby to control his or her own position in the womb.

Fat layers are rapidly accumulating under Baby’s skin, making him or her all cuddly. Baby now weighs about 1,8kg and is about 45cm long.

At this stage, Baby’s eyes move as if he or she is exploring your womb. Baby’s back is extremely flexible, allowing him or her to curl forward into the fetal position.

Baby now weighs about 2kg and can tuck his or head so far forward that it reaches their hands at the abdominal level.

By now, you should be able to see the skin creases on the palm of Baby’s hands. The brain continues to grow at a rapid pace.

Baby starts gaining weight rapidly, and all the finishing touches start taking place as your due date draws steadily near.

Baby may weigh as much as 3kg and be 50cm long. His or her skeleton starts to harden in preparation for birth.

Baby’s movements may start to feel less vigorous as the womb becomes more cramped, but he or she should still follow their regular pattern.

Baby’s head hair may be as long as 4,5cm by now, and his her skin will be very sensitive to touch all over their body.

Fat layers will be deposited under Baby’s skin right up until you give birth. Hang in there, you’ll meet Baby any day now!