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Trimester 1

Track your pregnancy development from trimester 1 to 3 with our detailed tracker. Experience every moment of growth with us!

Trimester 1

Pregnancy Tracker Week 1

Mother

First, a note about timing: Your pregnancy is dated from the first day of your last menstrual period. So, for the purpose of the calculation made by your healthcare professional, you are considered pregnant about 2 weeks before you actually conceived. During week 1, your normal menstrual period occurs.

Pregnancy Tracker Week 2

Mother

During this week, your body prepares to ovulate. Ovulation takes place when an egg is released from one of the ovaries. Once an egg is released from an ovary, it must be fertilised by a sperm within 12 to 24 hours for conception to occur. (If one fertilised egg splits or if multiple eggs are fertilised, you could have twins, triplets, or more!) The meeting of sperm and egg will take place near the end of this week.

Pregnancy Tracker Week 3

Mother

The united egg and sperm begins as a single cell, which divides very quickly and travels along the fallopian tube to the uterus (womb). Once in the womb, it burrows itself into the thick lining, where it will continue to grow. With no noticeable physical changes at this point, you probably won’t yet be aware that you have conceived.

Baby

The fertilized egg, called an embryo, beginning to grow inside you is tiny. By the time it reaches your uterus, it is a little ball of cells.

Pregnancy Tracker Week 4

Mother

The missed period that you were expecting at the end of this week will probably be the first major clue that you are pregnant. Tingling, tender, or swollen breasts may be another early sign that you are pregnant.

Baby

Baby’s cells continue to multiply, and placental tissue grows. At this point, though, the cluster of cells is microscopically small—no bigger than a poppy seed. Nevertheless, 3 different cell layers are developing that will later form your baby’s body. The ectoderm (outer layer) will produce your baby’s brain and nervous system, the eye lenses, tooth enamel, skin, hair and nails. The mesoderm (middle layer) will develop into the skeleton, heart, blood vessels, and muscles. The endoderm (inner layer) will become the lungs and digestive systems.

Pregnancy Tracker Week 5

Mother

Your breasts will begin to enlarge and may become tender. You may need to urinate more often than usual because of your expanding uterus. It is also common to feel noticeably more tired than usual—after all, your body is working hard to create a new human being!

Baby

This week, your baby is around 2mm long and looks more like a small tadpole. Your baby’s heart starts to beat, and the spinal cord, brain, arms, legs, liver and kidneys are starting to form.

Pregnancy Tracker Week 6

Mother

Some women may start to experience nausea and/or vomiting at this stage — commonly known as morning sickness. About 75% of pregnant women suffer from morning sickness, which may actually occur at any time during the day. At this time you may not notice much change externally. If you have had morning sickness and have not been eating as much as usual, you may have lost some weight.

Baby

Your baby now measures about 5-6 mm in length -the size of a lentil. Baby’s head is larger than the rest of their body, but their arm and leg buds are starting to lengthen. The facial features are forming and your baby’s tiny heart is beating at approximately 150 beats per minute. By now your baby is covered with a thin layer of clear skin.

Pregnancy Tracker Week 7

Mother

Although you may be starting to feel pregnant and notice your clothes are getting a little tighter, most people still won’t be aware that you are unless you tell them. You may also notice that you are more emotional these days—the many hormones circulating through your body, make mood swings almost inevitable.

Baby

Your baby is growing quickly, about 1cm long -the size of a blueberry. Their brain is forming about 100 cells per minute. Their mouth and tongue are forming, and also their arm and leg buds are now shaped like short paddles. Their kidneys are at a stage where they are ready to start waste management.

Pregnancy Tracker Week 8

Mother

Your pregnancy is slowly changing your figure. You may notice your waistline expanding.

Baby

Your baby now called a fetus is about 1.6cm in length. Despite this small size, their central nervous system and major organs are beginning to function. Their features are starting to take shape and they are now starting to look like a miniature human being.

Pregnancy Tracker Week 9

Mother

You may experience a roller coaster of emotions at this time. This is largely due to hormonal changes taking place in your body. Around this time you may also notice that you are more prone to gas, heartburn, and constipation. You can thank your hormones for these normal, if somewhat unpleasant, changes.

Baby

By now your baby measures about 2.3 cm long and weighs under 2g. Their arms are longer and bend at the elbows. Their fingers and toes are also now better defined. Muscles are starting to form and their internal organs continue to develop. Even though gender cannot be identified by ultrasound yet, your baby’s genitals have begun to form.

Pregnancy Tracker Week 10

Mother

Even though your clothes may not be fitting as well, you probably don’t need maternity clothes just yet. Every pregnancy belly is different, some show as early as the first trimester, others stay flat well into the second trimester. If you are slender to start with or had a baby before, you may show early. Hormones may also affect your interest in sexual activity either an increased or a diminished interest is perfectly normal.

Baby

Your baby now is about 3 cm in length and weighs about 4 g. The head is almost half the length of their body. Bones and teeth are forming, and their ears are starting to develop on the sides of the head. The heart, lungs, liver, kidneys, brain and intestines are fully formed and functional.

Pregnancy Tracker Week 11

Mother

Your uterus has now risen above your pelvis and is a little bigger than a grapefruit. During an external examination, your healthcare professional may be able to feel it. A dark vertical line may also start appearing across your belly.

Baby

Your baby is just over 5cm long and weighs about 9 g. The head is now one-third of their body and the torso is lengthening. Nail beds are starting to form on individual fingers and toes, and tiny hair follicles are starting to appear.

Pregnancy Tracker Week 12

Mother

You may notice weight gain in your abdomen and breasts with your clothes feeling tighter. You are probably starting to feel the best you have felt since becoming pregnant. At about this time, morning sickness may start to diminish for a lot of women. The risk of miscarriage has by now declined considerably, so you may be ready to share your good news with the world.

Baby

Your baby’s length is now approximately 6 cm and weights about 15g. All of the major organs, muscles, limbs and bones have finished forming—now they just need to mature. Although it is still too early to feel any movements, your baby is already moving around a fair bit.