Uterine size table: by year and pregnancy


Normal uterine size of a woman who has given birth and has not given birth

' Gynecology ' Uterus ' Which uterine and cervical sizes are considered the norm

Dimensions of the internal organs are considered by doctors to be an important diagnostic feature, so the values obtained during the examination are recorded in the medical records. Each woman has unique anatomical parameters, for example, the size of the uterus will always differ from person to person.

Age, height and weight, physique, number of pregnancies and their outcome influence the state of the organ. The most accurate method of establishing the norm is ultrasound, which shows the uterine length and width, as well as cervical parameters.

Structure and anatomical features

In the norm, the uterus is located in the pelvic cavity and is a hollow organ consisting of muscle tissue. In the case of patients of reproductive age, it takes a pear-shaped shape, so that its body, bottom and rounded area – the neck – can be clearly traced. After delivery, the uterus becomes ovoidous.

The uterine wall has a surface layer (or serous membrane), middle layer (muscular) and inner layer (endometrium). The cervix of the uterus of a woman giving birth and not giving birth differs, its usual size is determined by many parameters.

The norm of the size of the uterine cavity differs in girls who gave birth and did not give birth to women.

Women's length is on average 3.2 cm, width 1.5 cm. During puberty, the size of the uterus under the influence of estrogen increases and is: length – 4.5 cm, width – 3.8 cm. For girls who have not given birth, the uterine length is 4.8 cm on average, and the width is 4 cm. Cervical cervix of unborn girls is 2.5 – 2.6 cm.

Reproductive status and personal characteristics of the body can affect these values, so you need an additional examination.

It is known that the thickness of the inner layer varies depending on the phase of the cycle. In the first phase, endometrial dimensions vary up to 10 mm, in the second phase up to 14 mm.

Body size table normal for ultrasound

Normal uterine parameters differ between the patient who gave birth and the patient who did not give birth, but there are other sizes that determine the characteristics of the sexual system. Every woman should be aware of her body's characteristics when drawing up a health report.

The general table shows the normal size of the uterus for common categories, as well as information about the cervix.

Reproductive groupLengthWidthWidthWidthtd>Absence of pregnancytd>Neck
Wrinkle body (body)
Bullying, abortions, etc. д. in the anamnesis4,5-4,84,4-4,63,4-3,7
The only genera5,1-5,45,0-5,23,9-4,1
Second and subsequent births5,6-5,75,3-5,54,2-4,5
From 1 to 5 years after the arrival of menopause3.2-4.42.6-3.63.0-4.2
Better than 5 years after the arrival of menopause2,8-3,82,0-3,02,6-3,6
Absence of pregnancy2.4-3.42.3-3.0Not normalized
Trusts, abortions, etc. д. in the anamnesis2,6-3,62,4-3,1
Single births2.8-4.02.4-3.2
Second and subsequent births3,1-4,32,5-3,5
From 1 to 5 years after the onset of menopause2,5-3,31,9-2,9
More than 5 years after the menopause1.9-2.01.7-2.5

Normal uterine size can be affected not only by actual delivery, but also by pregnancy that has been interrupted for various reasons. The organ increases not only as a result of the growing fetus, but also as a result of the hormones the body produces from day one.

This usually remains in the body forever, so gynaecologists take into account the number of abortions and miscarriages interrupted.


Normal uterine size of an unborn woman is 3.9-4.5 cm long, 4.1-4.3 cm wide, 3.2-3.3 cm thick. But this is true only if the patient's body has never experienced conception, and a slight increase is due to the rate of hormone production during the development of the embryo, which was later rejected.

Slightly less noticeable increase in the rate of increase is associated with the presence of pathology, for example, myoma of the uterus can cause changes in it. When an unborn woman interrupts several pregnancies, her uterus may take on a normal form of organ, similar to the numbers of the patient who gave birth.

In the case of giving birth

In the case of a woman who gives birth, the following factors affect the part of the body to be described:

  • hormone production;
  • weight and fetal size;
  • volume of placenta and amniotic water;
  • generic process.

In the period of childbirth, the normal size of the uterus varies greatly, and this organ is also rapidly returning to normal after the birth of the child, but its size will change forever.

A woman who gives birth should be aware that the birth of a child will affect the condition of the uterine cavity and that her size can reach 5.1-5.4 cm in length, 5.0-5.2 cm in width, and 3.9-4.1 cm in thickness.

The birth of subsequent children will increase the size by approximately 1.5 cm

Normal neck values

The neck is conditionally divided into vaginal and supravaginal parts. It's pierced with a cervical channel. The neck opens into the cavity with a special opening – a shed, and its shape and diameter can be modified depending on the presence of natural births in the anamnesis. The normal value for a patient who has never been pregnant is approximately 3.0 – 3.5 cm long, 3 cm wide

Small value

The norm of cervical size of the uterus consists of a special control in midwives. East-ocervical failure can lead to premature births in early pregnancy.

The norm of neck parameters during pregnancy ranges from 4.5 cm in the first trimester to 3 cm in the third.

In the case of progressive abnormal reductions, the ICN is diagnosed, and the cervical length of the uterus is 2.5 cm before the 36 weeks of pregnancy, which is an indication for an obstetric pessary or sutures.

During pregnancy, the cervical size is measured with ultrasonic waves. In addition to the length of the organ, the condition of the inner shed and the cervical canal is assessed. Assess the degree of expansion of the channel, as well as the presence of an open internal shed. If the length of the pessary is less than 2-2.2 cm, the obstetric pessary cannot be delivered, and the sutures are also treated.

The small neck is treated on average from 14 to 25 weeks of pregnancy. Evidence suggests that timing may vary.

Uterine size is below normal in sexually mature girls and is a possible symptom of infantilism. Hypoplasia of the uterine body is described by insufficient ultrasound parameters, which, depending on the values, are differentiated by 3 degrees.

Big size

There is a notion of cervical elongation – elongation of cervical parameters, in particular length. During the first trimester, there is a lengthening of this department. In addition, the organ may increase in length with heavy exercise, obesity, uterine prolapse.

Enhancing uterine size above normal is observed in myoma, endometriosis, hyperplasia, tumor processes, after multiple births.

Source: https://ginekola.ru/ginekologiya/matka/kakie-razmery-matki-i-shejki-schitayutsya-normoj.html

Uterine size in pregnancy by week (table): why does it not match the size of the uterus

uterine size table: by year and pregnancy

Based on the dynamic development of the uterus, and the height of its bottom, the doctor evaluates the successful course of pregnancy. How do I measure the changing size of an organ correctly? Which deviations affect the increase? What to do if you are at risk of terminating your pregnancy? The unborn woman's uterus is very small: 5.0-6.0 cm long; 3.4-4.0 cm wide. Its weight is about 50 grams. In 9 months of gestation the organ undergoes huge changes, increasing in size, thinning, reaching a weight of up to 4 kg with the fruit. This transformation, which is recorded weekly in a special table of indicators, constitutes a dynamic course of pregnancy.

  • Leopold measurement
    • Early uterine bottom height
    • When the organ can be measured
  • Uterine parameters during pregnancy
    • Uterine wall thickness
    • Location
    • Dimensions at anatomical defects
  • Step change of uterus in pregnancy
    • Uterine size by week
    • When you can feel the uterus on your own
    • Cervical sizes in the table
    • Normal uterine sizes by weeks of pregnancy in the table
    • What can affect the height of the uterine floor
    • Changes in uterine fertility
  • Methods of supporting the small uterus or the worn-out cervical cervical if there is a threat of premature birth

    Why uterine size does not match the timing

Method of measuring the uterus during pregnancy

The measurement is carried out using the “Leopold technique” – a special obstetric technique.

  1. Measuring is performed with an empty bladder.
  2. Woman lies on the back, on the couch.
  3. From the pubic area in the middle of the abdomen, you can feel the area where the dense tissue becomes soft and loose – this is the boundary of the uterus, called the bottom.
  4. The soft line measures the distance from the pubic bone to the bottom.

The distance in centimeters coincides with the term set in weeks. Possible error: 1 – 2 cm. This calculation is applicable up to 37 – 38 weeks. Later, the uterus settles in the pelvic cavity, preparing for delivery.

Can we measure early?

In the first few weeks of pregnancy, the uterine tone of the uterus is only slightly tense. Its walls are softened, which contributes to stretching and increasing in weight. But the organ is within the normal limits, so it is impossible to measure its dimensions by the described method.

From when can a measurement be made?

To 6 weeks visual change is not observed. Conception is determined by hCG analysis, a urine test. Observation of the correctness of the formation of the placenta and embryo is carried out by ultrasound examination.

You can feel it in the lower abdomen from the 12th week of the uterus beyond the womb joint. From now on, weekly growth measurements are made and the dynamics of development are tracked.

Uterine parameters during gestation

Fetal growth causes a change in several directions. All of them matter in controlling the correct development.

Myometric thickness

Myometric thickness

The uterus is a muscular organ. Conception stimulates the active growth of myocytes.

For the first half of gestation the organ wall thickens 3-4 times, further increase, in the second half of gestation, occurs due to stretching of muscle fibers.

Approximately by the middle of the period the wall thickness is 3.5-4 cm. By the end of the third trimester, during the period of intensive growth of the child, the wall is thinning to 1 – 0.5 cm

The volume of the organ at the time of delivery increases by a factor of 400. In multiple pregnancies, these rates are even higher and the wall thinner.

Reposition in the cavity

In skinny ladies, a noticeable increase in the abdomen can be observed as early as 6 weeks of pregnancy. First, the changes take place in the antero-posterior direction, and the uterus takes the form of a ball. Later on, the transverse growth begins. By the 8-week period, the organ volume doubles, and by the 10-week period, it triples.

In the early period, the fetal egg is located in one of the uterus halves, which causes visual asymmetry of the abdomen.

As the embryo develops, it fills the entire cavity, and the abdomen becomes uniform. It matters where the embryo is attached.

If it is inserted on the back wall of the cavity, the abdomen is hardly noticeable, but if it is inserted on the front wall, the round protrusion is noticeable at an early stage.

Changes in pathological features

Uterine disposition and parameters change with anatomical features of the organ. A woman may not have any idea of abnormalities before she gets pregnant. But an anatomically inappropriate uterus can become a threat to pregnancy during the development of the embryo.

  • The inner cavity septum is a tie rod of connective tissue that divides the uterus lengthwise or transversely.
  • Bi>Two-thirds is the presence of a twin uterine cavity connected by a narrow aisle at the cervix.
  • Hypoplasia – the small uterus is often accompanied by an anatomically narrow pelvis, which makes natural births problematic.

Attention! These features have no impact on a woman's daily life, but pose a threat in pregnancy.

Step change in the uterus

Enhancing the organ gradually, allowing the female body to adapt to the new reality. A growing fetus squeezes the surrounding tissue, forcing it to change its lifestyle.

The uterus rise in the abdominal cavity

Each stage of development is accompanied by conditional boundaries:

  • 8 week. The uterus doubles in size compared to its original size, but there is no obvious visual change yet.
  • 12 week. The uterus protrudes above the lonal joint, which is the peak period of pregnancy toxicity.
  • 14 week. The organ increases to 12 cm, the first movement is felt.
  • 16 week. The size of the organ is 14 – 15 cm. All vital embryo structures have been fully formed. The upper boundary of the uterus is felt on the middle line between the womb and the umbilical cord fossa.
  • 18 week. The organ increases to 18-19 cm and moves closer to the umbilical cord cavity.
  • With 20 weeks the height of the uterus floor is set at 20 cm and adds a centimeter every subsequent week.

After 36 weeks the organ changes slightly – 5-2 mm per week.

By what time can you feel the uterus?

A woman can determine the boundary on her own for about 12 weeks. She'll feel like a little painless compaction over the bone joint. If there are pathologies (myoma, fibroma), the organ enlargement is faster. In multiple pregnancies, uterine size increases more rapidly.

How myoma affects pregnancy

The cervical normal table

The change is not only in the uterine cavity, but also in the cervical cervical cavity. Since conception, it lengthens, softens, changes color. Its length reaches 4.0-4.5 cm. Later on, there was a gradual shortening of the channel.

The following parameters indicate the successful development of pregnancy.

Gestation weeksMillimeter length

Importantly! Rapidly shortening the neck is a threat to full-fledged embroidery. Such progress is especially dangerous on the term up to 34 weeks.

Table of GMR – uterine bottom height

Uterine bottom height is measured weekly starting from 14 weeks. The data is recorded in the patient's individual table to monitor the dynamics. Physiologically normal pregnancy meets the following criteria.

Gestational termGDM, size in centimetersApproximate localization
16 week7Center between the buck and the umbilical cord dimple
20 week132 cm under the navel
24 week24Level with honeycomb
28 week282 cm above the umbilical cord fossa
32 week30On the middle line between the sternum and navel
36 week34The peak of standing reaches the subcostal and lower sternum boundary

Bottom of the uterus at week 38 the height of the uterus is not more than 32 cm, and the fetus falls into the pelvic cavity.

What Affects GMR

All the sizes described vary between 2-3 cm and depend on many factors:

  1. Genetically conditioned embryo mass. A large fetus adds a few centimetres but retains a positive dynamics.
  2. The location of the fetus in the cavity. At longitudinal presentation the bottom height is less than at transverse.
  3. Pelvic width. In the case of a narrow pelvis, the uterus is located above.
  4. The amount of amniotic water. Many waterways increase the volume and size of the organ.
  5. Morbid pregnancy, where there is a lack of dynamics.
  6. Few embryos.

Negative role is played by toxicosis, the emergence of infectious diseases, low weight gain.

How the effect of multiple pregnancies affects the abdomen grows rapidly in multiple pregnancies, it can already be over the longitudinal joint for 10-11 weeks. When measuring the GMT, the parameters have a gap of 5-7 cm. To the peak value (36-38 weeks) the upper limit is at a distance of 42-48 cm above the longitudinal joint.

Muscle fibres and skin stretch much harder, and childbirth occurs earlier – 36-37 weeks. In a multiplicity of short and dense journals, the neck becomes shorter and denser. And her physiological shortening is faster.

Methods of preserving pregnancy when the uterus is exhausted and the cervix is shortened

The cervix is a dense muscle ring that holds the fetus in place and prevents it from slipping into the vagina. During the whole period of gestation the neck is in tone, gradually shortening. At the start of labour, it opens up, releasing the baby's head.

If the neck weakening occurs earlier, it could result in spontaneous miscarriage and fetal death. Therefore, women are offered to strengthen their cervix in one of two suitable ways:

  1. Stitching in a circular manner. The procedure is performed in 14-26 weeks, and sutures are removed immediately before the labor process. Serklyazheniya – serklyazheniya – has its contraindications:
  • the cervix of the uterus, extended by more than 4 cm;
  • inflammatory process;
  • violation of integrity.

Serklyazh prevents premature delivery, but has a number of side effects: localized hemorrhages, cervical tears, rupture of the uterine wall.

  1. Pessary application is used when the cervix is exhausted to prevent spontaneous miscarriage. The device is a silicone ring applied to the lips of the neck. The ring evenly distributes the load on the organ, normalizes blood supply and nutrition of tissues. Prevents untimely neck opening. The pessarium is established on late terms of carrying (28-34 weeks) at risk of rejection of a fetus.

Symptoms of istmico-churchial insufficiency at pregnancy

Why the uterus does not match the date

Bottom height of the uterus does not always match the indicated date. Deviations may be significant, although the date of conception is set correctly. Why such a situation arises?

Placental insufficiency leads to a delay in the formation of the embryo, as a consequence – to a reduced dynamics. This condition is caused by the presence of hypothyroidism in the mother, prolonged exhausting toxicosis, severe viral infections.

Overse situation – increased uterine size in relation to the gestation time. Frequent diagnosis – high water – increased amniotic fluid. It occurs as a result of infection with an intrauterine infection (herpes, cytomegalovirus and others). It has been noted that high water levels occur in women with a history of surgical or spontaneous abortion.

In a dynamic pregnancy, the upper limit of the uterus falls within the weekly norms set out in the table.

But if abnormalities occur, it is not worth panicking, and there is no indication of fetal abnormalities. Reasons why the size of the uterus exceeds or falls short of the norm set.

It is necessary to conduct an examination and correct the timing and condition.

Svetlana Stas

Theme articles

Urinary changes in pregnant women

What happens to a woman's body during pregnancy

What to treat inflammation of the gums during pregnancy

Biochemistry of blood during pregnancy

Little water during pregnancy: Causes and consequences

What are the dangerous causes and consequences of high water levels in pregnant women

Source: https://stanumamoy== sync, corrected by elderman == sync, corrected by elderman ==

Cervical cervix in pregnancy: weekly lengths in the table and reasons for abnormalities

uterine size table: by year and pregnancy

The cervical cervix is the lower segment of the uterus itself, where the center of the channel is located and the first end of the channel opens into the uterus cavity, and the other end of the channel opens into the vagina. The length of the cervix is 30-40 mm and the cervical canal is closed.

What is considered the norm

The correct anatomical structure of the cervix consists of the vaginal part, which is examined by doctors using a gynecological mirror. The neck is connected to the vagina by means of vaults: the front vault, the rear vault and two other lateral vaults. The cervical canal runs through the cervix.

This canal is completely blocked by a special slime that prevents pathological germs from entering the uterine cavity. This mucus can also prevent sperm ingress. For example, in the middle of the cycle, the slime has a liquefaction property that allows sperm to penetrate the uterus cavity, where it enters the uterus directly into the uterus through the cervical canal.

During pregnancy, the cervix of the uterus is tightly covered with slime, so that the protection against fungi and germs becomes stronger.

The cervix itself is also able to change its size. For example, during childbirth, the cervix is opened by an average of 10 cm

The cervix has a special function during pregnancy - to directly hold the developing fetus in the uterus cavity.

Cervical cervical size is usually determined in two ways:

  • Manual examination with a gynecological mirror: external shed (closed or open), cervical canal and cervical density are evaluated.
  • Cervical cervical ultrasound: this study helps to reliably determine the size of the cervix and shows the condition of the internal shed.

When a woman is registered as a pregnant woman, the doctor examines the cervix of the uterus by hand, and then the size of the cervix is controlled from the 16th week of pregnancy until delivery.

At the second trimester of pregnancy, the ultrasound study is done transabdominally. During this examination, if the doctor notices a suspected cervical abnormality, then an intravaginal ultrasound scan is prescribed. Since only this study can accurately see the cervical length of the uterus and measure it.

All cervical measurements are necessary to avoid premature births.

Normally, during pregnancy, a cervical length study is prescribed 4 times.

Change in pregnancy

In early pregnancy, the cervix changes. Normally, a healthy woman's neck is pink, slightly shiny, smooth surface. During pregnancy, the cervical color of the uterus becomes bluish, blue. It's a consequence of a rich blood supply.

Cervical cervical scheme

Early changes

The neck is subject to strong internal changes at early stages, for example, it becomes denser and more elastic.

In the beginning of pregnancy, the neck can predict an upcoming miscarriage. If the doctor noticed a loose surface of the cervix and the cervix is ajar, it is the first sign to prepare the body for miscarriage.

Also, if during pregnancy is not completely closed cervical canal, it is a great threat to the fetus. First of all, this could be one of the reasons for a miscarriage. Second, it is the cause of infection, germs, fungi, which leads to infection and possible death of the fetus.

The cervical cervix initially changes during pregnancy at the 4th week, so it changes its usual position.

Late changes

Closer to the end of the pregnancy, midwives may learn about the approaching birth of the cervix when examining the cervix. The size of the neck, or rather the length, gradually decreases. Ultrasonic examination allows you to see how the inner yawning begins to expand. All this happens not in a few hours or days, but in a few months

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