39 Pregnancy Weeks

At 39 weeks of pregnancy, the mother is in the final stretch of pregnancy and the baby can come at any time. It is important to emphasize that, even if the pregnant woman is experiencing cramps, a hard stomach and all the other symptoms of contractions, it is still possible to opt for a cesarean section, if that is her desire. For this, talk to your doctor and check the most suitable date.

In the case of contractions, they usually appear in a rhythmic and regular way, so it is good to note the times they appear and their frequency. You will enter active labor when the contractions reach the onset mark every 10 minutes or less.

Remember that although the baby is already fully developed and ready to be born, it can still stay in the pregnant woman’s womb until 42 weeks gestation and there is nothing wrong with that. However, most obstetricians prefer to induce labor with intravenous oxytocin at 41 weeks.

If you want to stay on top of all the symptoms and events of the 39 weeks of pregnancy, just continue reading this post. Come with us!

Symptoms at 39 weeks of pregnancy

Your pregnancy is coming to an end, but some symptoms still remain. Since some of them may be labor, it is important to be aware of the signals your body gives you to notify your doctor of the possibility of the baby’s arrival.

Check out the main symptoms of 39 weeks of pregnancy:


The pregnant woman may feel bloated during the 39 gestational weeks and to avoid this discomfort it is ideal for the mother to keep her hydration up to date, take adequate rest and seek to follow the recommendations given by her obstetrician.


Tiredness is another common symptom during the 39 gestational weeks. The recommendation is that the mother sleeps as much as possible during the next few days to be able to rest and recharge her energy, after all, with the arrival of the baby, she will need to be in a good mood to take care of the newborn.

high belly

Some pregnant women may have a high belly at 39 weeks and this is completely normal, as there are situations where the baby only fits into the pelvis during labor. To avoid this bothering you, wear comfortable clothes and lingerie, preferably specific for pregnant women.

vaginal discharge

The mucus plug has a gelatinous, transparent appearance that starts to be expelled through the vagina at the end of pregnancy. Thus, it is common for pregnant women at 39 weeks of pregnancy to perceive it as a vaginal discharge, which may or may not be accompanied by blood.


The contractions tend to get more intense during the 39 weeks of pregnancy and as mentioned above, the best thing is that the pregnant woman starts to notice the times of her appearances. Among the most common symptoms of contractions we can cite: strong cramps in the lower abdomen, back pain, hard stomach and rhythmic occurrences.

Back pains

One of the symptoms of 39 weeks of pregnancy is back pain.

Back pain can remain during this gestational period and the reason for this is the weight that the belly makes, putting a strain on the back. To avoid and alleviate them, try to get as much rest as possible throughout the day, do stretching exercises (always with your doctor’s permission) and prioritize a regular night’s sleep daily.

frequent urination

This is another symptom that will remain until the baby is born due to the pressure that the uterus puts on the bladder, reducing its reservoir. At this stage of pregnancy, you should have already gotten used to it and created a routine of going to the bathroom that does not bother you, and remember: as soon as your child is born, this will pass and the tendency is for your frequency to return to what was before.

Changes in pregnant women at 39 weeks of pregnancy

Regarding changes in pregnant women during this gestational period, it is observed that there are no major physical changes compared to previous weeks. What will draw most attention is the anxiety and uncertainties that are still huge.

But we can say that you have to put up with film and that soon, everything will be rewarded. Focus on resting and waiting for the baby to arrive, which we are sure will be magical.

If by chance you’re scared about anesthesia and childbirth, don’t worry! We are sure that you will be well assisted and that everything will happen in the best possible way.

Furthermore, in the vast majority of cases anesthesia does not hurt more than a normal injection and is usually much simpler than you imagined. Don’t create expectations and fears, it only increases your anxiety, ok?

Development of the fetus at 39 weeks of pregnancy

At 39 weeks of gestation, the fetus is already fully developed and is just waiting for the right time for its birth.

During 39 weeks of pregnancy, the baby is developing his immune system which will need to be replaced through breastfeeding.

However, there are still some events that occur during this gestational period, see which are:

  • The baby’s immune system can strengthen for the next few days as some antibodies from the mother will be passed to him through the placenta protecting him from illness and infection in the first few months of his life;
  • This immunity must be completed through breastfeeding. If it is not feasible, the mother will need to talk to the obstetrician to assess what is the best milk option to offer him;
  • Although you can still sense the presence of the vernix, the baby is plumper, with a layer of healthy fat and soft skin;
  • The toenails have reached all the way to the fingertips and, in relation to hair, this can vary from baby to baby: while some are born with a lot of hair, some may have little hair and others may even be bald.

What is the size of the fetus at 39 weeks pregnant?

During the 39 gestational weeks the fetus is approximately 50 centimeters, the size equivalent to a small watermelon, and its estimated weight is 3.3 kilograms.

Diarrhea in late pregnancy: should I worry?

Many times when women are waiting for their purse to break, this being the most awaited moment at the end of pregnancy, women end up facing diarrhea. At the same time that it generates frustration, it also generates concern. After all… Is it normal to have diarrhea at the end of pregnancy?

The answer to that question is YES! In addition to being normal, it is, in some cases, expected. Diarrhea in late pregnancy happens as a signal from the body that the bowel needs to empty so that the uterus can contract properly.

See what are other signs that signal the proximity of the baby’s arrival:

  • Backache;
  • Diarrhea and abdominal pain;
  • Contractions;
  • Pressure in the pelvis;
  • Note that the belly is low;
  • Feeling of energy and energy peak;
  • Burst breakage.

So if you happen to have cases of diarrhea accompanied or not by other symptoms described above, be alert: this is a sign that your baby’s arrival is near.

In addition, be sure to contact your doctor and advise you of the onset of diarrhea as the risk of dehydration is great and this could complicate your condition. Other precautions you can take to contain diarrhea are: avoid milk and dairy products, keep a light diet and hydrate yourself correctly (drink at least 2 liters of water a day).

What to do to go into labor?

Labor happens naturally between the 37th and 40th gestational week and it is important that the pregnant woman try to remain calm and wait for the baby’s correct time. However, there are some methods that help the body and speed up this process, making it happen faster and less painful. Check it out below:

  • Walk: walks with accelerated steps preferably 1 hour in the morning and 1 hour in the afternoon can speed up labor as they make the baby descend more and more in relation to the pelvis and its pressure under the uterus causes the production of oxytocin increases, which is responsible for uterine contractions;
  • Sexual intercourse: having sexual intercourse during pregnancy is also effective and will help to speed up labor as it can induce the production of oxytocin, stimulate the uterus and also soften the cervix. But beware: this method is not recommended after the bag breaks, after all, you would be putting the baby at risk of contamination;
  • Acupuncture: acupuncture is another method used and recommended. However, remember that for safe practice you need to seek an acupuncturist who specializes in pregnant women and have permission from your obstetrician;
  • Stimulating Foods: Raspberry leaf tea is a widely used method recommended by many doulas . They make your uterus stronger and labor faster and less painful.

Well, we hope that you were able to understand what the main symptoms and events are at 39 weeks of pregnancy. If you have any questions regarding this matter, just comment here in the post and we clarify.

Oh, and don’t forget that in this final stretch of pregnancy it is very important to be patient and know how to control anxiety. For this, continue taking the necessary care for a smooth pregnancy and follow all the guidelines given by your obstetrician, ok?

In the next few days we will publish the post referring to the 40th gestational week with the latest events during pregnancy. So keep following our blog and find out all about pregnancy and motherhood. To the next!

Dr. Tabriella Perivolaris, MD1
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Dr. Tabriella Perivolaris, Sara's mother and fan of fashion, beauty, motherhood, among others, about the female universe. Since 2018 she has been working as a copywriter, always bringing to her articles a little of her experience and experience as a mother and woman.

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