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The 12th week of pregnancy has arrived! You are coming to the end of the most difficult first period of pregnancy. We answered all of the questions such as how a 12-week-old baby develops, does a 12-week-old baby move in the mother’s womb, is the gender determined at 12 weeks of pregnancy, read now!
12 Weeks Baby Development
First of all, the most curious “how many cm is a 12-week-old baby?”, “How should the 12-week baby’s height and weight be?” Let’s talk about the questions. Check out the chart below!
12 weeks baby development | |
---|---|
12 weeks baby size | 6.1cm |
12 weeks baby weight | 8-14 grams |
You will most likely be able to hear your baby’s heartbeat at your checkup at (or soon) week 12 of pregnancy. You can hear the heartbeat of a 12-week-old baby with a special listening device, a Doppler. Because this device increases the sound so that the heartbeat can be heard.
- Fingers and toes are now separated this week. Nails are growing.
- Fine hairs appear on various parts of the body.
- The digestive system can create contractions that push food into the intestines. It can also absorb glucose (sugar).
- The pituitary gland in the brain begins to produce many hormones.
- Nervous system develops more.
- The amount of amniotic fluid increases. The total volume is now 50 ml.
Let’s see, will the gender be determined at 12 weeks? to the question! Now the external reproductive organs begin to show distinct signs for male and female sex characteristics. However, you will have to wait until at least the 16th week for a clear result.
“Can baby movements be felt at 12 weeks?” Let’s talk about the subject. The 12-week-old baby starts to move in the womb, but you cannot feel this movement for a while yet.
12 Weeks Baby Image

12 Weeks Baby Ultrasound Image

The 12-week pregnancy ultrasound image may look like this. But remember, this image is here to give you an idea. Your baby’s position, development and posture may be different.
Changes in the Mother at 12 Weeks of Pregnancy
How many months is 12 weeks pregnant? you may wonder. You are pregnant in your 3rd month! 12 weeks pregnant mothers are in the last week of the 3rd month of this process. So the end of the first period has come. This is good news because for most women, first-period side effects subside in the second trimester. So, what happens at 12 weeks pregnant?
1. Increases Estrogen and Progesterone Production
At 12 weeks pregnant, your baby and placenta produce more estrogen and progesterone than your ovaries.
As a result of increased production of estrogen and progesterone, the breasts and the mammary glands continue to grow. You may also see the brown circles around your nipples getting bigger and darker. The breasts may feel fuller and heavier. At the same time, tenderness and pain continue to decrease.
2. The uterus grows
By the 12th week of pregnancy, the uterus is large enough to fit inside the pelvis. At the end of this week, the uterus expands to the point where it can no longer fit into the lower abdominal cavity. With this enlargement, the pressure on the bladder also decreases. Therefore, the complaint of frequent urination due to the pressure on the urinary bladder will no longer be eliminated.
3. May Have Weight Gain
If you’ve had a pregnancy before, you’ll start to notice that you’re pregnant sooner and you’ll feel more comfortable wearing loose-fitting clothes. You may start to gain weight from the sides of your abdomen. You may also notice weight gain in the hips and legs. “How much weight gain in 12 weeks of pregnancy?” The answer to the question varies from person to person. You should consult your doctor for accurate information.
12 Weeks Pregnancy Image

Symptoms at 12 Weeks of Pregnancy
1. Headache
Headaches are normal at 12 weeks pregnant . This is due to increased blood production. With the increase in blood production, the heart continues to pump harder and faster. This difference in the circulatory system also manifests itself as headache and sometimes even dizziness.
There are many ways to reduce headaches.
- Eating a regular and balanced diet,
- Get enough sleep and rest
- Regular outdoor walks
- Doing breathing regulation and relaxation exercises,
- You can try methods such as changing the lighting of your environment.
2. Changes in the Volume
- Skin can change in many ways during pregnancy. In many women, the skin on the lower abdomen darkens and takes on a brown-black appearance. A vertical line is formed, called the linea nigra.
- Occasionally, brown spots of various sizes appear on the face and neck. These spots disappear or become lighter after birth.
- With the clarification of the capillaries (angioma), bumps that separate into small red branches form on the skin.
- A similar situation is the redness of the palm. These changes are thought to be caused by the increased estrogen level during pregnancy.
Things to Consider at 12 Weeks of Pregnancy
It’s time, how should those who are 12 weeks pregnant be fed? to the question. It is unhealthy to gain too much weight during pregnancy, especially during the initial period (first 3 months) up to the 12th week. If you gain too much weight, it will be difficult for you to carry your baby. In fact, childbirth can be more difficult.
It goes without saying that not having breakfast and consuming fast food for lunch or dinner is harmful. Because in this 12-week period, if you realize how your behavior affects your baby, what you eat and when you eat will become more important.
Suggests If You’re a Mom!
When you think about what you can do with your baby, do you forget yourself? Do you postpone doing activities that will be good for you and your baby due to weakness and fatigue? If you say yes, we suggest you spend time with whatever is good for your body and soul.
For example, you can do pregnant pilates or pregnant yoga for a healthier body during pregnancy. These exercises will be very good for you not only during pregnancy, but also during childbirth and even after! If you wish, you can check our Pregnant Pilates and Pregnant Yoga Center page and contact the companies.