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Pregnancy week by week

To count the days and months of pregnancy, you should take into account that the first day of gestation is the first day of your last menstrual period, and although you may not yet be pregnant, this is the date that the health care professional will take into account because it is very difficult to know exactly when you ovulated and when conception occurred.

Complete gestation lasts on average 9 months, and although it can reach 42 weeks of gestation, doctors can induce labor if labor does not start spontaneously until 41 weeks and 3 days.

1 month- until 4 and a half weeks of pregnancy

In this stage, you probably do not know you are pregnant yet, but the fertilized egg has implanted itself in the uterus and  what maintains pregnancy is the presence of the corpus lutuem. See what are the first 10 symptoms of pregnancy and estimated date of delivery.

2 months: between 4 and a half and 9 weeks of pregnancy

At 2 months of pregnancy the baby already weighs 2 to 8 g. The baby's heart begins to beat at about 6 weeks of gestation and although it is still similar to a bean, it is at this stage that most women find out they are pregnant. Malaise and morning sickness are typical of this phase and usually last until the end of the third month of gestation. They are caused by hormonal changes and some useful tips can be avoiding intense aromas and resting, as fatigue tends to increase nausea.

3 months - between 10 and 13 and a half weeks of pregnancy

At 3 months of pregnancy, the embryo measures almost 10 cm, weighs between 40 and 45 g, and begins to form ears, nose, bones and joints, and the kidneys begin to produce urine. At the end of this phase, the risk of miscarriage decreases as well as nausea. The belly begins to appear and the breasts become increasingly bulky, which increases the risk of getting stretch marks.

4 months - Between 13 and a half and 18 weeks of pregnancy

At 4 months of pregnancy the baby measures on average 15 cm and weighs about 240 g. It begins to swallow amniotic fluid, which helps to develop the alveoli of the lungs, sucks his finger and his fingerprints are already formed. His fine skin is covered by the lanugo, and although the eyelids of his eyes are closed, he already notices the difference between the light and the darkness. An morphological ultrasonography will be able to show the baby to its parents, but the baby's sex will probably not be seen yet at this stage.

5 months - Between 19 and 22 weeks of pregnancy

At 5 months of pregnancy your baby measures on average 30 cm and weighs about 600 g. The arms and legs become more proportional to the body and it becomes more and more like a newborn baby. He begins to hear the sounds and particularly the voice and the beating of the mother's heart. Nails, teeth and eyebrows begin to form. You may begin to develop a darker line from the navel to your genital area and training contractions can appear.

6 months - Between 23 and 27 weeks of pregnancy

At 6 months of pregnancy the baby measures between 30 and 35 cm and weighs between 1000 and 1200 g. He begins to open his eyes, presents a sleep routine and has a better developed palate. His hearing is getting more and more intense and so your baby can already perceive external stimuli, responding to touch or getting frightened with loud noises. You may notice the baby's movements more easily, so caressing your belly and talking to him can calm him down.

7 months - Between 28 and 31 weeks of pregnancy

At 7 months the baby measures on average 40 cm and weighs about 1700 g. Your head is bigger and your brain is developing and expanding, so your baby's nutritional needs are getting bigger. The baby moves with more liveliness and his heartbeats can already be heard with a stethoscope. Parents should start buying the necessary items for the baby, such as the clothes and the crib, and prepare the bag to take to the maternity ward.

8 months - Between 32 and 36 weeks of pregnancy

At 8 months of pregnancy the baby measures about 45 to 47 cm and weighs about 2500 g. It begins to move his head from side to side, the lungs and the digestive system are already formed, the bones become stronger and stronger, but it will have less space to move and, therefore, it is normal for the mother to notice less baby movements. For pregnant women, this phase can be uncomfortable because their legs become more swollen and the varicose veins may appear or worsen, so walking for 20 minutes in the morning may help.

9 months - Between 37 and 42 weeks of pregnancy

At 9 months of pregnancy the baby measures on average 50 cm and weighs between 3000 and 3500 g. At this stage, the baby is fully formed and is only gaining weight. In the following weeks the baby should be born, but he has until 41 weeks and 3 days to come into the world. If the contractions do not start spontaneously until this time, the doctor will probably have to induce labor with synthetic oxytocin in the hospital. 

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