Average weight for 25 week fetus

Fetal Chart from Baby My Baby

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(crown to rump measurements)

Gestational Age	Length (inches)	Weight (oz/lb)	Length (cm)	Mass (g)
8 weeks	0.63	0.04 oz	1.6	1
9 weeks	.9	0.07 oz	2.3	2
10 weeks	1.22	0.14 oz	3.1	4
11 weeks	1.61	0.25 oz	4.1	7
12 weeks	2.13	0.49 oz	5.4	14
13 weeks	2.19	0.81 oz	7.4	23
14 weeks	3.42	1.52 oz	8.7	43
15 weeks	3.98	2.47 oz	10.1	70
16 weeks	4. 57	3.53 oz	11.6	100
17 weeks	5.12	4.94 oz	13	140
18 weeks	5.59	6.70 oz	14.2	190
19 weeks	6.02	8.47 oz	15.3	240
20 weeks	6.46	10.58 oz	16.4	300
21 weeks	10.51	12.70 oz	26.7	360
22 weeks	10.94	15.17 oz	27.8	430
23 weeks	11.38	1.10 lb	28.9	501
24 weeks	11.81	1.32 lb	30	600
25 weeks	13.62	1.46 lb	34.6	660
26 weeks	14.02	1.68 lb	35.6	760
27 weeks	14.41	1.93 lb	36.6	875
28 weeks	14. 80	2.22 lb	37.6	1005
29 weeks	15.2	2.54 lb	38.6	1153
30 weeks	15.71	2.91 lb	39.9	1319
31 weeks	16.18	3.31 lb	41.1	1502
32 weeks	16.19	3.75 lb	42.4	1702
33 weeks	17.20	4.23 lb	43.7	1918
34 weeks	17.72	4.73 lb	45	2146
35 weeks	18.19	5.25 lb	46.2	2383
36 weeks	18.66	5.78 lb	47.4	2622
37 weeks	19.13	6.30 lb	48.6	2859
38 weeks	19.61	6.80 lb	49.8	3083
39 weeks	19.96	7.25 lb	50.7	3288
40 weeks	20. 16	7.63 lb	51.2	3462
41 weeks	20.35	7.93 lb	51.7	3597
42 weeks	20.28	8.12 lb	51.5	3685
43 weeks	20.20	8.19 lb	51.3	3717

English

Fetus size by week: Your baby's weight throughout pregnancy

Find out how big your baby is during each week of their development with our fetal growth chart. From early in pregnancy, babies grow at different rates, so your baby's actual size by week may vary substantially – but look how they grow! At 20 weeks your baby may be just over 10 inches long and weigh less than 12 ounces, but by 32 weeks they'll reach almost 17 inches and top 4 pounds. At 33 weeks they may be over 17 inches and closer to 5 pounds, and by 37 weeks they'll reach 19 inches and about 6.5 pounds.

How do you determine fetus size by week?

There are different methods for estimating how big a fetus is, which is why you'll find different numbers depending on the source.

Experts have formulas they use to come up with the estimated fetal weight (EFW) and height of a fetus, and the formulas aren't always the same. The measurements that are used in equations to estimate weight usually include biparietal (head) diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur (thigh bone) length (FL).

Height is a straightforward measurement, but the method of measuring it changes after the first trimester. For the first 13 weeks, the height measurement is taken from the top of the head to the baby's bottom. After the first 13 weeks, the measurement is taken from the top of the head to the baby's heel – explaining why, on the chart below, your baby appears to grow 3 inches from week 13 to week 14!

Hadlock, the main source we use in our fetal growth chart, provides one of the most commonly used – and most accurate – equations for estimating fetal height and weight. The American College of Obstetrics and Gynecology (ACOG) and the Society for Maternal and Fetal Medicine (SMFM) use Hadlock's figures to diagnose and manage fetal growth conditions, such as intrauterine growth restriction (IUGR).

The numbers on our chart should coincide with the numbers your healthcare provider will be checking against when they measure your baby using ultrasound. (Providers don't measure height after 13 weeks, however, so don't expect to get those numbers at your ultrasound appointments.)

Note that the data used by Hadlock was gathered from middle-class Caucasian women with no history of maternal diseases known to affect fetal growth and no evidence of congenital anomalies. Your provider may make adjustments based on your individual circumstances.

Fetal growth chart

Wondering how big your baby is during each week of pregnancy? The numbers in our chart below can give you a sense of your baby's size. Keep in mind that your baby may be much smaller or larger than these averages. That's okay – after all, healthy babies can weigh less than 5 pounds or more than 9 pounds at birth.

Boy's measurements are different than girl's measurements, even this early. For the numbers on our chart, we've taken an average of boys and girls. And remember, the height measurements up to 13 weeks are head-to-bottom estimates, while the height measurements starting at week 14 are head-to-toe estimates.

Gestational age	Length (US)	Weight (US)	Length (cm)	Mass (g)
	(head to bottom)		(head to bottom)
8 weeks	0.62 inches	0.71 ounces	1.57 cm	20 grams
9 weeks	0.91 inches	0.95 ounces	2.30 cm	27 grams
10 weeks	1.22 inch	1.23 ounces	3.1 cm	35 grams
11 weeks	1.61 inch	1.59 ounces	4.1 cm	45 grams
12 weeks	2.13 inches	2.05 ounces	5.4 cm	58 grams
13 weeks	2. 64 inches	2.58 ounces	6.7 cm	73 grams
	(head to toe)		(head to toe)
14 weeks	5.79 inches	3.28 ounces	14.7cm	93 grams
15 weeks	6.57 inches	4.13 ounces	16.7 cm	117 grams
16 weeks	7.32 inches	5.15 ounces	18.6 cm	146 grams
17 weeks	8.03 inches	6.38 ounces	20.4 cm	181 grams
18 weeks	8.74 inches	7.87 ounces	22.2 cm	223 grams
19 weeks	9.45 inches	9.63 ounces	24.0 cm	273 grams
20 weeks	10.12 inches	11.68 ounces	25.7 cm	331 grams
21 weeks	10. 79 inches	14.07 ounces	27.4 cm	399 grams
22 weeks	11.42 inches	1.05 pounds	29.0 cm	478 grams
23 weeks	12.05 inches	1.25 pounds	30.6 cm	568 grams
24 weeks	12.68 inches	1.48 pounds	32.2 cm	670 grams
25 weeks	13.27 inches	1.73 pounds	33.7 cm	785 grams
26 weeks	13.82 inches	2.01 pounds	35.1 cm	913 grams
27 weeks	14.41 inches	2.33 pounds	36.6 cm	1055 grams
28 weeks	14.80 inches	2.67 pounds	37.6 cm	1210 grams
29 weeks	15.47 inches	3. 04 pounds	39.3 cm	1379 grams
30 weeks	15.95 inches	3.44 pounds	40.5 cm	1559 grams
31 weeks	16.46 inches	3.86 pounds	41.8 cm	1751 grams
32 weeks	16.93 inches	4.30 pounds	43.0 cm	1953 grams
33 weeks	17.36 inches	4.77 pounds	44.1 cm	2162 grams
34 weeks	17.84 inches	5.24 pounds	45.3 cm	2377 grams
35 weeks	18.23 inches	5.72 pounds	46.3 cm	2595 grams
36 weeks	18.62 inches	6.20 pounds	47.3 cm	2813 grams
37 weeks	19.02 inches	6.68 pounds	48. 3 cm	3028 grams
38 weeks	19.41 inches	7.13 pounds	49.3 cm	3236 grams
39 weeks	19.72 inches	7.57 pounds	50.1 cm	3435 grams
40 weeks	20.08 inches	7.98 pounds	51.0 cm	3619 grams
41 weeks	20.39 inches	8.35 pounds	51.8 cm	3787 grams

Thanks to Dr. Mark Curran, maternal-fetal medicine specialist, for his help preparing this chart.

Fetal weight by week: How it changes

Your baby steadily gains weight over the course of your pregnancy, but it's not always at the same rate. If you're having one baby (not twins or multiples), your baby's rate of growth accelerates until 35 weeks, then decelerates.

Here are some highlights, based on estimations:

Up until 16 weeks, a fetus grows an average of about 19 grams per week, gradually increasing from 7 grams per week at 8 weeks to 15 grams per week at 12 weeks and 29 grams per week at 16 weeks.
By 20 weeks, a fetus is gaining about 59 grams per week (just over 2 ounces).
By 30 weeks, a fetus is gaining about 175 grams each week (more than 6 ounces).
At 35 weeks, a fetus is gaining about 215 grams each week, or about 7.5 ounces. At this point their growth rate peaks.
After 35 weeks, growth slows to about 188 grams per week, or 6.6 ounces. (Twins slow earlier, at around 28 weeks, and then average about 170 grams each week.)
In the last few weeks of pregnancy, the growth rate continues to gradually slow to about 168 grams (a little less than 6 ounces) per week by week 40.

Using a tape measure stretched over your belly, your provider will use a fundal height measurement to check your baby's size at your prenatal visits. Beginning at about 24 weeks, the measurement in centimeters should roughly match the gestational age of your baby. If you're 26 weeks pregnant, for example, your fundal height should be about 26 cm, give or take a centimeter in each direction.

If your provider is concerned that your baby is too small, they'll monitor your baby's size with ultrasound, which is more accurate. Using ultrasound, your practitioner can take various measurements (head circumference and diameter, abdomen circumference, femur length) and use them to estimate your baby's size. They may also use a Doppler ultrasound to look at the blood flow to your placenta.

If your baby's estimated weight is less than the 10th percentile for their gestational age, they may be diagnosed with intrauterine growth restriction (IUGR), also called fetal growth restriction (FGR). IUGR can happen at any time during pregnancy. Some babies with IUGR just turn out to be small for their age, but sometimes there's a problem that's preventing the baby from growing properly.

At birth, a baby with IUGR is called "small for gestational age." While most SGA babies who are otherwise healthy grow just fine, some (especially those born prematurely) are at higher risk of problems such as c-section, jaundice, low blood sugar, and even long-term developmental and health problems.

Your baby's size by week

Here are some highlights of your baby's growth during pregnancy:

At 20 weeks, about the midpoint in your pregnancy, your baby is transmitting taste signals to their brain. And you may feel them hiccupping. Your baby's weight at 20 weeks is about 11.68 ounces, and they're about the length of a (10.12-inch) banana.

At 32 weeks, your baby's lungs are developing fast, and your baby's storing minerals like iron for their first 6 months of life. Your baby's weight at 32 weeks is 4.30 pounds, and their length is 16.93 inches, about the size of a jicama.

At 33 weeks, things are getting snug in there! Your baby's skin is becoming less wrinkled as they fill in – your baby's weight at 33 weeks is about 4.77 pounds. At 17.36 inches, your baby is now about the size of a pineapple.

At 37 weeks, your baby's brain and lungs are still maturing, and they're still moving a lot, despite the close quarters. Your baby's weight at 37 weeks is about 6. 68 pounds, and they're about the length of a bunch of Swiss chard, 19.02 inches.

Once your baby is born, they'll be weighed and measured, and your provider will continue to monitor their growth. While the average newborn weight is a little over 7 pounds, most newborns lose about 5 to 10 percent of their weight in the first days. No worries – they gain it back by the time they're about 2 weeks old, and by 4 months they usually double their birth weight.

Learn more:

To-do lists for the first, second, and third trimesters
Pregnancy Due Date Calculator
Pregnancy Weight Gain Calculator
How to understand pregnancy weeks, months, and trimesters

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Pregnancy calendar 25 weeks - Miracle Doctor multidisciplinary clinic in Moscow

Week 25 begins the third trimester of pregnancy and at the same time completes the cycle of fetal development, when it is not yet officially viable. From the beginning of next week, the chance of surviving an early birth in a child will increase significantly. At the 25th week of pregnancy, the weight of the fetus is on average 700 grams, and the length is 33 centimeters. Due to the low content of subcutaneous fat, he still has reddish and wrinkled skin, but the intensive development of the muscular system continues. nine0003

The baby's body during this period solves the main task - it prepares for birth. The endocrine glands actively produce hormones that will be required for adaptation in the outside world. In the fetus, the process of brain development continues, its structure becomes more complicated. Further development of the nervous system makes the child susceptible to pain. A headache is usually caused by a lack of oxygen in the blood, and the fetus begins to give signals in the way that is available to it: the baby's activity increases or, conversely, it freezes. nine0003

Changes also occur with the respiratory system: the alveoli are covered with a surfactant, a fat-based substance that prevents the alveoli from completely collapsing and sticking together during exhalation. However, at this stage of pregnancy, the surfactant is still not enough to guarantee the expansion of the lungs during preterm pregnancy. Therefore, a child born at 25 weeks of gestation is far from always viable and can only survive under conditions of specialized care and equipment for artificial ventilation of the lungs. nine0003

At the same stage of pregnancy, the muscles that fix the eyeballs develop. The baby's palms can clench into fists, the fingers gain dexterity and now he is able to grab his own leg. The child begins to give preference to the right or left hand. On ultrasound, you can see how the twins play with each other.

The fetus has developed an individual mode of sleep and wakefulness. When he wakes up, he signals this with jerks and a burst of activity. nine0003

At the 25th week of pregnancy, the bone marrow functions as the main organ of hematopoiesis.

At a gynecological examination, the doctor measures the parameters of the abdomen of the expectant mother. This is required to control the growth and development of the baby. The uterus, in which the fetus is located, has reached the size of a soccer ball. By pressing on the diaphragm and hypochondrium, it lifts the stomach up. Displacement of the stomach causes stomach acid to rise up the esophagus and this causes heartburn. This can be especially felt after overeating, so the diet is of great importance during this period. It is necessary to take food in small portions 5-6 times a day. Vegetables, sea fish, fruits are useful. Do not forget about multivitamins for pregnant women. nine0003

Elevating the diaphragm can cause a woman to experience slight shortness of breath, which becomes worse with exercise. Since the baby needs a sufficient amount of oxygen for intensive development, a woman should devote at least three hours a day to walks in the fresh air in any weather. Walking time should be divided into several periods in order not to overload the legs. Between walks, a woman should be in a position with raised legs as often as possible to prevent varicose veins. Effective measures to prevent the development of this disease include wearing special stockings. nine0003

25 weeks pregnant is the time to purchase a prenatal bandage. Its size should correspond to the girth of the abdomen at the level of the navel plus 5 centimeters.

At this time, some women experience anemia for the first time. Prenatal iron stores have come to an end, as it is in demand by both the mother's body and the fetus. Symptoms of iron deficiency anemia are: lethargy, dry skin, general weakness, headache, formation of seizures (cracks) in the corners of the mouth. The condition with anemia requires mandatory correction, otherwise the fetus will suffer from a lack of iron. nine0003

At the 25th week of pregnancy, you should begin preparing the mammary glands for lactation: choose a bra that fits your size, pour cool water over your breasts, and massage your nipples with a rough towel. If the nipples are retracted, then it is necessary to carefully, gently pull them out. Women with a threatened miscarriage should begin nipple preparation only in the last weeks of pregnancy, because nipple stimulation can cause uterine contractions and premature birth. nine0003

25-28 weeks pregnant

25 weeks pregnant

Baby at 25 weeks

This week the baby is mostly head down. Even if this does not happen, there will still be time to change the situation. The body length of the baby reaches 32 cm, weight - about 750 g. The face is already almost formed and you can clearly see the cheeks, nose, lips, eyebrows and eyelids. During this period, the weight gain in the baby will go faster than the growth in length. Mom can even feel how the baby hiccups. You should not worry about this, but you need to tell the doctor. The baby is actively moving at night and during the day, his lungs have completed the process of formation, although they are not yet ready to fully function. The skin on the body is already brightening and straightening. Now the skeletal system is actively strengthening, so mom needs to eat more foods containing calcium. Subcutaneous fat continues to accumulate, and this is the reason for the formation of wrinkles on the legs, arms and buttocks. This week is very interesting because the baby can already clench his fists and play with his fingers, and right now it is determined whether he will be right-handed or left-handed. You can also track in what periods the baby sleeps and when he is awake. nine0003

Mother's well-being at the twenty-fifth week

The expectant mother's tummy is growing, weight is steadily gaining (approximately 350 g per week). Now it is important to control salt intake in order to avoid possible edema. They can be not only unpleasant, but also quite dangerous. Mom feels great, but it is very important not to overload yourself and take good care of yourself. A woman constantly needs positive emotions, good sleep and rest. This week, the bottom of the uterus rises above the pubis by 25 cm. If this distance is less, the doctor may state a lag in the development of the crumbs, so control is important. A growing uterus can limit physical exercise and the duration of walks, so it is very important for a mother to choose comfortable shoes and clothes, and a bandage will help to make the condition more comfortable. This week it is necessary to control the level of hemoglobin in the blood. Evidence of its decrease may be rapid fatigue, shortness of breath, frequent heartbeat. This is a period of very active consumption of iron, which is so important for the future of the crumbs. In this case, anemia may develop. It is not a disease, but is physiological in nature (it happens only during pregnancy). The appointment of special iron preparations can always correct the situation and bring the hemoglobin level back to normal. nine0003

What happens to the baby at the twenty-sixth week of pregnancy

The baby continues to develop and grow, his weight reaches 900 g, and his height is 34 cm. During this period, the baby will be able to stay alive if he decides to be born prematurely. In the second trimester, almost all the organs of the little man are formed. The intensity of the movements and the force of the pushes of the little one are becoming stronger, and the mother may be uncomfortable and painful. The crumbs have a lot of space, which allows him to tumble and move actively. Although it is already fully formed, the body is still small and thin. Basically, the baby gains weight by accumulating fat and due to muscle growth. The baby is able to distinguish the taste of amniotic fluid, which changes in accordance with what the mother ate. Now there is an active formation of lung tissue, it plays an important role in the respiratory system of a small organism. Within a week, the child's reproductive system effectively develops, in boys the testicles begin to move into the scrotum, and in girls the genitals and vagina are formed. The baby already clearly distinguishes the voices of relatives, recognizes his mother's voice, familiar sounds. Therefore, now he can sing lullabies. The baby hears the mother's heartbeat and after birth will be able to fall asleep better if it is placed on the chest. The baby can already distinguish between light and darkness, his eyeballs continue to form. nine0003

What happens to the mother at the twenty-sixth week of pregnancy

Already significantly enlarged tummy begins to restrict breathing (I want to take a deep breath), shortness of breath may appear. This week, mom's total weight may increase by about nine kilograms. It is harder for the expectant mother to walk, a bandage, comfortable clothes and shoes will help alleviate the condition. Now it is important for a woman to spend a lot of time outdoors, increasing the number or time of walks. The mother's visual acuity may also decrease, but this is a temporary phenomenon. The bottom of the uterus rises to a distance of 26 cm from the pubis. The uterus grows about 1 cm per week, putting pressure on other organs. This week, mom can attend special sports sections and provide herself with moderate physical activity. It is not recommended to stay in a sitting or lying position for a long time. nine0003

Women are now concerned about the appearance of age spots on the skin. There are no effective remedies against this, mom needs to be patient and just wait. After childbirth, the skin condition returns to normal. Practice contractions may appear this week, they are not dangerous, but if they occur, you should inform your doctor. It is very important for a future mother to protect herself from stress, the support and care of loved ones can help in this. For a woman, homemade food is preferable, it is important to split portions and eat often and in small quantities. This will help reduce the discomfort of heartburn and nausea that may occur this week. The process is quite natural, the enlarging uterus puts pressure on the organs of the digestive system and displaces them. nine0003

How the baby develops at the twenty-seventh week of pregnancy

Active movements and growth are characteristic of the baby in this week. He still has enough space in his mother's tummy and nothing hinders his movements. The baby actively moves the arms and legs and can still roll over if the head is up. The strength of his pushes increases, and this is due to constant training and an increase in muscle mass. The baby is actively preparing for birth, training arms and legs. From this period, the development of the endocrine system and its important part - the pituitary gland, which plays a huge role in the growth of the baby. The work of the thyroid gland is activated, which produces important hormones that regulate the metabolism in the body. The production of hormones this week allows the baby to provide for his own needs, because until this moment the mother's hormones played the main role. This week is the main one in the formation of the individual metabolic system of the baby and his reaction to many events and processes in life. The weight of the baby also increases, reaching 1000 g, and the length of the body is 34 cm. The baby's body is covered with fluffy hairs, there are small soft nails on the fingers. All the same, the lungs continue to develop, which train for the birth of a baby. The baby receives oxygen through the placenta. The baby begins to distinguish colors and can turn his head towards the light source, he can feel pain and clench his tiny fists. nine0003

How the expectant mother feels at the twenty-seventh week of pregnancy

It's getting a little more difficult for mom this week. The activity of the child can cause pain. A woman's mood often changes, and during this period, the support and care of loved ones is especially important. A mother may have experiences and fears that should not be silent, it is better to share them with her husband or girlfriends. On the physiological side, edema, dizziness and increased meteosensitivity may occur. The stretching skin on the tummy often begins to itch, and a special cream can help in this case. The uterus of a woman during this period is located at a distance of approximately 28 cm from the pubis. Mom continues to gain weight, due to an increase in the amount of amniotic fluid, the weight of the placenta and the baby. Under the weight of the tummy, a woman's posture may change, lower back pain and excessive sweating appear. It is better for a woman to rest lying on her side, sleep on her back should be minimized. Ideal for mom and baby will be swimming in the pool. Due to the fact that the baby's endocrine system begins to work independently, changing the hormonal background, the mother feels better. This week, convulsions may appear, you should not be afraid of this, the phenomena will pass after childbirth. Changes in body position, a special cream, light massage of this area will help to minimize discomfort. nine0003

Baby at 28 weeks

Baby this week is already 1200 g and 35 cm tall. Gradually, tiny tufted hairs begin to fall out, remaining in the area of the shoulders, back and lower back. The hairs on the head, eyebrows and eyelashes gradually darken, and it is already possible to guess what color they will be after birth. The baby is getting better and better at distinguishing sounds and voices, at this time you can put on lullabies so that he starts to get used to them. The baby is already starting to blink his eyes and open his eyelids a little. The weight of the brain increases, grooves appear on its surface. More and more, the baby begins to distinguish the taste of products. Mom's preferences in tastes and smells will be passed on to the baby, since already from this period he begins to get used to what his mother loves and eats. The skeleton of the baby is already almost formed, but the bones remain soft, and they will continue to harden even after the birth of the baby. nine0003

This week is also important for the formation of the psyche and character of the baby. It may happen that the baby will be more active at night than during the day. Do not worry, during the day when mom walks, the baby sways in her tummy and falls asleep. Therefore, its activity at night is quite understandable.

Mom changes at 28 weeks

Mom gains about 10 kg this week, uterus rises 28 cm from the pubis. Now it is very important to take care of yourself, avoid falls and not overwork. Mom feels the movements of the crumbs very well, because he has grown significantly and began to take up more space in the woman's tummy. The movements have become much more felt, and the tremors are now more painful. The baby spends more time in wakefulness, the period of his activity in connection with this has also increased significantly. The condition of the mother now significantly affects the condition of the baby. If the mother is nervous, the baby will be restless too. Much also depends on the mother's nutrition: eating sweets will give the baby energy and cause activity. The woman also experiences increased pain in the lower back, back and legs, she is more likely to get tired and suffer from shortness of breath. For sleep, it is important to choose a comfortable position, and this is becoming increasingly difficult. Mom becomes less and less agile, her thought processes slow down. This week there is a threat of termination of pregnancy, a woman may also have increased pressure and, in connection with this, her health may worsen.