Pregnancy Stages First Trimester (4, 8, 12 Weeks)

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First trimester of pregnancy is week 1 through week 12 – in other words, it is the first 3 months of your pregnancy. All stages of pregnancy are crucial for the growth of your baby. So, what are changes you will notice in the first trimester? How far your baby will grow? What else you need to know? Keep reading!

As well we know, in general pregnancy takes more than 9 months (about 40 weeks) from the first day of your last menstruation to the day of birth. We call each 3 months as ‘trimester’. So there are 3 major trimesters; 1st trimester (week 1 through week 12), 2nd trimester (week 13 to week 17), and 3rd trimester (week 28 to the day of delivery)!

How long until you show you’re pregnant?

The answer varies from women to women. But typically, you will begin to experience the pregnancy symptoms in the first 1-2 months after your conception. Read also some common earliest signs of pregnancy 6 week after you conceive in here!

Frequent urination problem, morning sickness (nausea and vomiting), breast tenderness, missed period, and easy to get fatigue are some common symptoms that occur in the first 3 months of pregnancy. However, the first trimester symptoms can vary from women to women. Even the symptoms also may be different to your first pregnancy (if you are being pregnant for the second time).

It’s undeniable that the size of your belly is the clearly answer for the question. You do believe that you are being pregnant when you notice your belly is growing bigger day by day. Many times we clearly notice this change in the end of the first trimester or at early weeks of the second trimester.

Changes in the first 3 months of your pregnancy!

In the first week after your conception, your fertilized egg will be transformed into a structure called blastocyst (a microscopic ball of cells). Then it implants on your uterus’s wall. The process of this implantation triggers and causes a number of physical & hormonal changes .

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Changes of your hormones trigger some pregnancy symptoms. Of course, you will notice a missed period afterwards, the most common and clearly pregnancy symptom. Other signs and symptoms may include:

  1. Weight gain! You may notice it clearly in the end of your trimester. But if you experience weight loss, see a doctor for more advice! Having adequate nutrition is so crucial for pregnant women. Weight loss may signal that you are being at lack of nutrient.
  2. You may also often experience mild headache. If you have severe headache, see your doctor promptly to keep safe. Severe headache may point a problem that may require a prompt treatment.
  3. Constipation – a problem associated with a bowel movement!
  4. You are more sensitive to certain smells (such as the smells of coffee, smoke of cigarette smoking, etc). You’re also likely to crave for certain foods.
  5. Heartburn (a burning sensation /irritation of esophagus). It is commonly caused by stomach contents that come back up /re-flux! In pregnant women, heartburn is usually caused by hormonal changes that affect the way of digestive tract muscles to work. Heartburn during pregnancy may get worse in the 2nd & 3rd trimesters – about 50 percent of all pregnant women experience severe heartburn in the last two-thirds of pregnancy.
  6. Mood changes & swings – you are easier to lose control of your mood (sensitive feeling)!
  7. Breast changes.
  8. Frequent urination! As the fetus growing bigger in size, it can give more pressure to other organs. As a result, you may often need to pass urine!
  9. Morning sickness! It is characterized commonly by nausea and vomiting that can strike anytime – but many women say that morning is the worst time of this symptom.
  10. Fatigue! You are more likely to have fatigue (you may get your tired really easily).

As your body changes and the growth of your baby, you may need to respond this condition by changing some of your daily routines.

For instances, you may need to eat more often with small meals in order to ease your nausea and vomiting. You might also need to go to your bed earlier due to fatigue symptom that you have. You might choose loose fitting clothes instead of tight clothes. Then your doctor usually also ask you to take your prenatal vitamins, keep hydrated, eat healthy nutritional diet, etc.

In addition, about 8th week of pregnancy are crucial time when the most major organs of your baby develop. And during these changes, your baby is very vulnerable to unfriendly substances, like radiation, alcohol, or infectious diseases.

Stages of first trimester pregnancy

The first trimester can be divided into three major groups; 4 weeks, 8 weeks, and 12 weeks from the day of your last menstrual cycle.

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