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Countdown Pregnancy Ticker

Friday, April 30, 2010

Average fetal length and weight:

Can you guess what is my present weight at the moment?
NO? I knew it!
My mom also wonders every time when she stares at her bump how much weight she is carrying in er tummy..this is a very interesting and evident question that comes to the mind of any mother who is carrying a baby..

But one more important thing to note here at this stage is that all pregnancies are different and all babies are also different as far as the growth pattern and weight gain and development is concerned. Hence do not panic a lot if you see that your babies weight is more or less than the average it should be at that point of gestational age.

I will tell you why we grow differently..
The thing is at some times we feel very hungry and energetic and tend to have more nutritions than some other times. Hence it may happen quite naturally that we are gaining more weight and maturing more at some gestational age than some other point of time.Hence the bottom line is do not worry if you notice little discrepancies in the fetal weight gain according to gestational age..rather consult your doctor if you are too much concerned :)

Average fetal length and weight:

From early in pregnancy, babies grow at different rates, so these numbers are merely averages. Your baby's actual length and weight may vary substantially. Don't worry too much if an ultrasound indicates that your baby is much smaller or larger. (Your practitioner will let you know if it's time to worry about how big your baby is.) By full-term, your baby may end up weighing less than 5 pounds or more than 9.

Note that babies are measured from the crown (or top) of the head to the rump (or bottom) until about 20 weeks. This is because a baby's legs are curled up against his torso during the first half of pregnancy and very hard to measure.

After that, babies are measured from head to toe.

See our help section if you have questions about how we count the weeks of pregnancy and gestational age.

Gestational ageLength (US)Weight (US)Length (cm)Mass (g)
(crown to rump)(crown to rump)
8 weeks0.63 inch0.04 ounce1.6 cm1 gram
9 weeks0.90 inch0.07 ounce2.3 cm2 grams
10 weeks1.22 inch0.14 ounce3.1 cm4 grams
11 weeks1.61 inch0.25 ounce4.1 cm7 grams
12 weeks2.13 inches0.49 ounce5.4 cm14 grams
13 weeks2.91 inches0.81 ounce7.4 cm23 grams
14 weeks3.42 inches1.52 ounce8.7 cm43 grams
15 weeks3.98 inches2.47 ounces10.1 cm70 grams
16 weeks4.57 inches3.53 ounces11.6 cm100 grams
17 weeks5.12 inches4.94 ounces13 cm140 grams
18 weeks5.59 inches6.70 ounces14.2 cm190 grams
19 weeks6.02 inches8.47 ounces15.3 cm240 grams
20 weeks6.46 inches10.58 ounces16.4 cm300 grams
(crown to heel)(crown to heel)
20 weeks10.08 inches10.58 ounces25.6 cm300 grams
21 weeks10.51 inches12.70 ounces26.7 cm360 grams
22 weeks10.94 inches15.17 ounces27.8 cm430 grams
23 weeks11.38 inches1.10 pound28.9 cm501 grams
24 weeks11.81 inches1.32 pound30 cm600 grams
25 weeks13.62 inches1.46 pound34.6 cm660 grams
26 weeks14.02 inches1.68 pound35.6 cm760 grams
27 weeks14.41 inches1.93 pound36.6 cm875 grams
28 weeks14.80 inches2.22 pounds37.6 cm1005 grams
29 weeks15.2 inches2.54 pounds38.6 cm1153 grams
30 weeks15.71 inches2.91 pounds39.9 cm1319 grams
31 weeks16.18 inches3.31 pounds41.1 cm1502 grams
32 weeks16.69 inches3.75 pounds42.4 cm1702 grams
33 weeks17.20 inches4.23 pounds43.7 cm1918 grams
34 weeks17.72 inches4.73 pounds45 cm2146 grams
35 weeks18.19 inches5.25 pounds46.2 cm2383 grams
36 weeks18.66 inches5.78 pounds47.4 cm2622 grams
37 weeks19.13 inches6.30 pounds48.6 cm2859 grams
38 weeks19.61 inches6.80 pounds49.8 cm3083 grams
39 weeks19.96 inches7.25 pounds50.7 cm3288 grams
40 weeks20.16 inches7.63 pounds51.2 cm3462 grams
41 weeks20.35 inches7.93 pounds51.7 cm3597 grams
42 weeks20.28 inches8.12 pounds51.5 cm3685 grams

taken from :http://www.babycenter.com/


Fetal Development at different gestational age:

9 weeks of gestation:start of fetal stage to 25 weeks:
The fetal stage commences at the beginning of the 9th week. At the start of the fetal stage, the fetus is typically about 30 mm (1.2 inches) in length from crown to rump, and weighs about 8 grams.The head makes up nearly half of the fetus' size.Breathing-like movement of the fetus is necessary for stimulation of lung development, rather than for obtaining oxygen.The heart, hands, feet, brain and other organs are present, but are only at the beginning of development and have minimal operation.

Fetuses are not capable of feeling pain at the beginning of the fetal stage, and will not be able to feel pain until the third trimester.At this point in development, uncontrolled movements and twitches occur as muscles, the brain and pathways begin to develop.

16 to 25 weeks after fertilization:
A woman pregnant for the first time (i.e. a primiparous woman) typically feels fetal movements at about 21 weeks, whereas a woman who has already given birth at least two times (i.e. a multiparous woman) will typically feel movements by 20 weeks. By the end of the fifth month, the fetus is about 20 cm (8 inches).

26 to 40 weeks of gestation:
The amount of body fat rapidly increases. Lungs are not fully mature. Thalamic brain connections, which mediate sensory input, form. Bones are fully developed, but are still soft and pliable. Iron, calcium, and phosphorus become more abundant. Fingernails reach the end of the fingertips. The lanugo begins to disappear, until it is gone except on the upper arms and shoulders. Small breast buds are present on both sexes. Head hair becomes coarse and thicker. Birth is imminent and occurs around the 40th week. The fetus is considered full-term between weeks 35 and 40, which means that the fetus is considered sufficiently developed for life outside the uterus.It may be 48 to 53 cm (19 to 21 inches) in length, when born. Control of movement is limited at birth, and purposeful voluntary movements develop all the way until puberty.

taken from:http://en.wikipedia.org/wiki/Fetus

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