40th Week of Pregnancy – 40 Weeks of Pregnancy Development and Experiences


Article Outline

I. Introduction A. Explanation of pregnancy duration B. Importance of tracking pregnancy progress II. How Many Months is the 40th Week of Pregnancy? A. Explanation of gestational period and trimesters B. Calculation of pregnancy months III. Changes in the Mother During the 40th Week of Pregnancy A. Physical changes B. Emotional changes IV. Birth Symptoms at 40 Weeks Pregnancy A. Overview of labor and delivery B. Signs of impending labor C. What to do when experiencing birth symptoms V. 40 Week Baby Development A. Overview of fetal development during the 40th week B. Major milestones VI. Factors That Affect Pregnancy Duration A. Genetics and family history B. Health and lifestyle factors VII. How to Track Pregnancy Progress A. Prenatal visits and tests B. At-home monitoring methods VIII. Conclusion A. Recap of key points B. Importance of seeking medical advice during pregnancy IX. FAQs

How Many Months is the 40th Week of Pregnancy?

Pregnancy is an exciting and transformative experience for expectant mothers, but it can also be overwhelming, especially when it comes to tracking pregnancy progress. One of the most common questions women ask is how many months is the 40th week of pregnancy. In this article, we’ll answer that question and provide a comprehensive guide to the changes that happen to both mother and baby during the 40th week of pregnancy.

Explanation of Gestational Period and Trimesters

Before we dive into the specifics of the 40th week of pregnancy, it’s important to understand the gestational period and trimesters. Pregnancy lasts for an average of 280 days, or 40 weeks, from the first day of the last menstrual period (LMP) to the date of delivery. However, this period can vary from woman to woman and can be influenced by various factors such as genetics, age, and health.

Pregnancy is typically divided into three trimesters, each lasting around 12 to 14 weeks. The first trimester is from week 1 to week 12, the second trimester is from week 13 to week 27, and the third trimester is from week 28 until delivery.

Calculation of Pregnancy Months

Based on the average duration of pregnancy, the 40th week falls in the third trimester, which means that a woman is in her ninth month of pregnancy. However, it’s important to note that the calculation of pregnancy months can be a bit tricky, as not all months have the same number of weeks.

For example, if a woman’s due date is on the 20th of the month, the 40th week would begin on the 13th of that month. If that month has 31 days, the 40th week would end on the 19th of the following month, which means that the woman would be in her ninth month for the majority of the 40th week.

Changes in the Mother During the 40th Week of Pregnancy

As the due date approaches, the mother’s body undergoes various changes in preparation for labor and delivery. These changes can affect both her physical and emotional well-being.

Physical Changes

During the 40th week of pregnancy, the mother may experience the following physical changes:

  • Braxton Hicks contractions: These are mild contractions that help the uterus prepare for labor. They may feel like menstrual cramps and usually go away with rest and hydration.
  • Pelvic pressure: As the baby descends into the pelvis, the mother may feel increased pressure
  • Increased fatigue: The mother may feel more tired as her body prepares for labor and delivery.
  • Increased vaginal discharge: The body produces more cervical mucus as it prepares for labor, which can result in increased vaginal discharge.
  • Swelling: The mother may experience swelling in her feet, ankles, and hands due to fluid retention.

Emotional Changes

The mother’s emotional state can also be affected during the 40th week of pregnancy. She may feel more anxious or stressed as the due date approaches, especially if she’s a first-time mother. It’s important for her to have a support system and to practice relaxation techniques to help manage stress and anxiety.

Birth Symptoms at 40 Weeks Pregnancy

As the body prepares for labor, the mother may experience various signs and symptoms that indicate that delivery is imminent. These include:

  • Bloody show: The release of the mucus plug that blocks the cervix during pregnancy, which can be a sign that labor is starting soon.
  • Rupture of membranes: The breaking of the amniotic sac, which can result in a gush or trickle of fluid from the vagina.
  • Contractions: Contractions become more frequent, longer, and stronger as labor progresses.

If the mother experiences any of these symptoms, it’s important to contact her healthcare provider immediately.

40 Week Baby Development

During the 40th week of pregnancy, the baby is considered full-term and is ready for delivery. The major milestones that occur during this week include:

  • Lung development: The lungs continue to mature and produce surfactant, a substance that helps the air sacs stay open and prevents them from collapsing.
  • Weight gain: The baby continues to gain weight, with an average weight of 7 to 8 pounds.
  • Head position: The baby should be in the head-down position, ready for delivery.

Factors That Affect Pregnancy Duration

While the average pregnancy duration is 40 weeks, various factors can affect the length of pregnancy, including:

Genetics and Family History

Some women may have a genetic predisposition to shorter or longer pregnancies. Family history can also play a role, as women who were born to mothers who had longer pregnancies may also have longer pregnancies themselves.

Health and Lifestyle Factors

Various health and lifestyle factors can also affect pregnancy duration, including:

  • Age: Women over 35 may be at higher risk of longer pregnancies.
  • Medical conditions: Certain medical conditions such as diabetes, high blood pressure, or thyroid disorders can increase the risk of longer pregnancies.
  • Smoking: Smoking during pregnancy can increase the risk of longer pregnancies.
  • Nutrition: Poor nutrition can increase the risk of longer pregnancies.

How to Track Pregnancy Progress

To ensure a healthy pregnancy, it’s important to track pregnancy progress and seek medical advice when necessary. This can be done through:

Prenatal Visits and Tests

Regular prenatal visits and tests can help healthcare providers monitor the mother and baby’s health and detect any potential complications. These visits usually occur every 4 to 6 weeks during the first two trimesters and every 2 to 3 weeks during the third trimester.

At-Home Monitoring Methods

Some at-home monitoring methods can also help track pregnancy progress, such as:

  • Fetal kick counts: Counting the baby’s movements can indicate fetal well-being.
  • Blood pressure monitoring: Monitoring blood pressure can help detect any potential complications such as preeclampsia.


The 40th week of pregnancy marks the end of an incredible journey, and the beginning of a new one. It’s a time of anticipation, excitement, and perhaps a bit of anxiety. Remember to take care of yourself, listen to your body, and ask for help when you need it. Congratulations on reaching this milestone, and best of luck with labor and delivery!



Q1. Can I still exercise during week 40 of pregnancy?

A: Yes, light exercise like walking or prenatal yoga is still safe and recommended during week 40 of pregnancy. However, consult with your healthcare provider before starting any new exercise routine.

Q2. How will I know if I’m in labor?

A: The signs of labor include regular contractions, lower back pain, cramping, water breaking, and bloody show. Contact your healthcare provider if you experience any of these symptoms.

Q3. Can I still have sex during week 40 of pregnancy?

A: Yes, sex is generally safe during week 40 of pregnancy, but avoid positions that put pressure on your abdomen, and use a condom to prevent infections.

Q4. How can I prepare for labor and delivery?

A: Some ways to prepare for labor and delivery include attending childbirth classes, creating a birth plan, packing a hospital bag, and discussing pain relief options with your healthcare provider.

Q5. When should I go to the hospital?

A: Contact your healthcare provider if you experience regular contractions, your water breaks, or you have vaginal bleeding. They will advise you when to go to the hospital.

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