What Size Is a Baby at 19 Weeks

Image of a human fetus.

Overview

How long does it have for a baby to be born? A typical pregnancy lasts 40 weeks from the first solar day of your concluding menstrual period (LMP) to the birth of the baby. It is divided into 3 stages, chosen trimesters: first trimester, 2d trimester, and third trimester. The fetus undergoes many changes throughout maturation.

A missed period is often the first sign that you may be pregnant

How Soon Tin can You lot Tell If You Are Pregnant?

A missed period is often the first sign that you may be significant, but how practice yous know for sure? Many women use home pregnancy tests to tell if they are pregnant; withal, these tests are more likely to be accurate when used at least one week afterwards a adult female'south last period. If you take the examination less than 7 days earlier your last menstrual period, it may requite you a simulated upshot. If the test is positive, it is more likely that you actually are pregnant. Yet, if the test is negative, there is an increased take a chance that the test is wrong. Your doctor can do a blood test to detect pregnancy sooner than a home pregnancy test can.

The amount of weight a woman should gain during pregnancy depends on her body mass index (BMI) prior to becoming pregnant.

Pregnancy Weight Gain

The amount of weight a woman should gain during pregnancy depends on her body mass index (BMI) prior to becoming pregnant. Women who are a normal weight should gain between 25 and 35 pounds. Women who are underweight prior to pregnancy should gain more than. Women who are overweight or obese prior to pregnancy should gain less. The recommended caloric intake for a normal weight woman who exercises less than 30 minutes per week is 1,800 calories per 24-hour interval during the first trimester, two,200 calories per twenty-four hour period during the second trimester, and 2,400 calories during the third trimester.

Women gain weight all over their bodies while they are pregnant.

Pregnancy Weight Gain Distribution

Women gain weight all over their bodies while they are significant. Fetal weight accounts for about vii i/2 pounds by the finish of pregnancy. The placenta, which nourishes the babe, weighs about 1 1/2 pounds. The uterus weighs 2 pounds. A woman gains about 4 pounds due to increased claret volume and an additional 4 pounds due to increased fluid in the torso. A adult female's breasts gain 2 pounds during pregnancy. Amniotic fluid that surrounds the baby weighs 2 pounds. A woman gains about vii pounds due to backlog storage of poly peptide, fat, and other nutrients. The combined weight from all these sources is most thirty pounds.

Pregnant women may experience certain complications and symptoms as the fetus grows.

Pregnancy Complications

Meaning women may experience certain complications and symptoms as the fetus grows. Anemia, urinary tract infection, and mood changes may occur. An expectant female parent may feel loftier claret pressure (preeclampsia), which increases the hazard of preterm delivery and other potential dangers for the baby. Severe forenoon sickness or hyperemesis gravidarum causes persistent nausea and vomiting, particularly during the first 12 pregnancy weeks. This may lead to first trimester symptoms of weight loss and dehydration, requiring 4 fluids and antinausea medication. Pregnant women should be aware of the possibility of developing gestational diabetes. Information technology causes symptoms like excessive thirst and hunger, frequent urination, and fatigue. Obesity and excessive weight gain are possible, especially equally the pregnancy progresses. Women are supposed to gain weight during pregnancy, but excessive weight proceeds may be associated with symptoms that put mother and baby at risk. Ask your dr. how much weight you should gain during your pregnancy.

Illustration examples of the first, second, and third trimesters of pregnancy.

The 3 Stages of Pregnancy
(ane^st, ii^nd, and iii^rd Trimester)

Conception to almost the 12th week of pregnancy marks the first trimester. The second trimester is weeks 13 to 27, and the third trimester starts about 28 weeks and lasts until nascence. This slide show will discuss what occurs to both the mother and baby during each trimester.

First Trimester

Commencement Trimester

First Trimester: Week ane (conception) – Calendar week 12

A woman with a home pregnancy test examines her stomach in the mirror.

Start Trimester: Early Changes in a Woman's Body

The early changes that signify pregnancy become present in the first trimester. A missed period may be the starting time sign that fertilization and implantation accept occurred, ovulation has ceased, and y'all are pregnant. Other changes will likewise occur.

An exhausted woman (top left), woman with morning sickness (top right), woman eating a pickle with ice cream (bottom left), and woman weighing herself (bottom right).

First Trimester: Physical and Emotional Changes a Adult female May Feel

Hormonal changes will touch almost every organ in the body. Some signs of early pregnancy in many women include symptoms similar:

Extreme fatigue
Tender, bloated breasts. Nipples may beetle.
Nausea with or without throwing up (morning time sickness)
Cravings or aversion to certain foods
Mood swings
Constipation
Frequent urination
Headache
Heartburn
Weight gain or loss

A pregnant mom letting her son touch her belly.

Starting time Trimester: Changes in a Woman'southward Daily Routine

Some of the changes you feel in your commencement trimester may cause you to revise your daily routine. You may need to go to bed before or consume more frequent or smaller meals. Some women feel a lot of discomfort, and others may not feel whatever at all. Pregnant women experience pregnancy differently, even if they've been meaning earlier. Pregnant women may feel completely differently with each subsequent pregnancy.

Development of embryo at approximately 4-6 weeks.

Starting time Trimester: The Baby at 4 Weeks

At 4 weeks, your baby is developing:

The nervous system (encephalon and spinal cord) has begun to form.
The heart begins to class.
Arm and leg buds brainstorm to develop.
Your baby is at present an embryo and 1/25 of an inch long.

An eight week old human embryo.

First Trimester: The Baby at viii Weeks

At viii weeks, the embryo begins to develop into a fetus. Fetal development is apparent:

All major organs have begun to form.
The baby'southward heart begins to trounce.
The arms and legs grow longer.
Fingers and toes accept begun to form.
Sex organs begin to form.
The face begins to develop features.
The umbilical cord is conspicuously visible.
At the terminate of eight weeks, your infant is a fetus, and is nearly ane inch long, weighing less than ⅛ of an ounce.

Human fetus in utero at twelve weeks.

First Trimester: The Baby at 12 Weeks

The end of the first trimester is at about week 12, at this point in your baby's evolution:

The nerves and muscles begin to work together. Your baby can make a fist.
The external sex organs show if your baby is a male child or girl.
Eyelids close to protect the developing eyes. They will not open again until week 28.
Head growth has slowed, and your baby is about iii inches long, and weighs almost an ounce.

Second Trimester

2nd Trimester

Second trimester: Week 13 – Week 28

A pregnant woman starting to show.

Second Trimester: Changes a Adult female May Feel

Once yous enter the second trimester you lot may find it easier than the offset. Your nausea (morning sickness) and fatigue may lessen or get away completely. However, you will also notice more than changes to your body. That "baby crash-land" will start to show equally your abdomen expands with the growing babe. By the cease of the 2d trimester you will even be able to feel your infant move!

A pregnant woman with back pain (left), pregnant woman with stretch marks and line running down her belly (center), and woman with melasma (pregnancy mask) on her cheek (right).

Second Trimester: Physical and Emotional Changes in a Adult female

Some changes yous may observe in your torso in the 2d trimester include:

Back, belly, groin, or thigh aches and pains
Stretch marks on your abdomen, breasts, thighs, or buttocks
Darkening of the skin around your nipples
A line on the pare running from belly push to pubic hairline (linea nigra)
Patches of darker peel, unremarkably over the cheeks, forehead, nose, or upper lip. This is sometimes called the mask of pregnancy (melasma, or Chloasma facies).
Numb or tingling hands (carpal tunnel syndrome)
Itching on the abdomen, palms, and soles of the feet. (Phone call your medico if you lot have nausea, loss of appetite, vomiting, yellowing of skin, or fatigue combined with itching. These can be signs of a liver problem.)
Swelling of the ankles, fingers, and face. (If you discover whatever sudden or extreme swelling or if you gain a lot of weight quickly, phone call your medico immediately. This could be a sign of a serious condition called preeclampsia.)

The human fetus at about four months showing the head and upper limbs and the umbilical cord which connects the fetus (at the navel) to the placenta.

2nd Trimester: The Baby at 16 Weeks

As your torso changes in the second trimester, your babe continues to develop:

The musculoskeletal organisation continues to form.
Pare begins to form and is nearly translucent.
Meconium develops in your infant's intestinal tract. This will be your baby's start bowel movement.
Your baby begins sucking motions with the oral cavity (sucking reflex).
Your baby is about 4 to 5 inches long and weighs almost 3 ounces.

Human fetus near his fifth month of development.

2d Trimester: The Baby at 20 Weeks

At about 20 weeks in the second trimester, your babe continues to develop:

Your babe is more than active. You might feel movement or boot.
Your baby is covered past fine, feathery hair called lanugo and a waxy protective coating called vernix.
Eyebrows, eyelashes, fingernails, and toenails accept formed. Your babe can even scratch itself.
Your infant can hear and swallow.
Now halfway through your pregnancy, your baby is about 6 inches long and weighs about ix ounces.

Human fetus at approximately 24 weeks showing details of his closed eyes, nose, mouth, and facial hair.

Second Trimester: The Baby at 24 Weeks

By 24 weeks, even more changes occur for your growing infant:

The infant's os marrow begins to make blood cells.
Gustation buds form on your baby'due south tongue.
Footprints and fingerprints have formed.
Pilus begins to grow on your baby'due south head.
The lungs are formed, merely practise not yet work.
Your baby has a regular slumber cycle.
If your baby is a male child, his testicles begin to descend into the scrotum. If your babe is a girl, her uterus and ovaries are in place, and a lifetime supply of eggs has formed in the ovaries.
Your baby stores fat and weighs about 1½ pounds, and is 12 inches long.

Third Trimester

3rd Trimester

Tertiary Trimester: Week 29 – Week xl (birth)

A pregnant woman stretching her back while sitting.

Tertiary Trimester: Changes a Woman May Experience

The third trimester is the last stage of pregnancy. Discomforts that started in the second trimester will likely continue, forth with some new ones. Every bit the infant grows and puts more than pressure on your internal organs, you may find you have difficulty breathing and have to urinate more frequently. This is normal and one time you lot requite nascency these problems should become away.

A pregnant woman holding her stomach.

Third Trimester: Emotional and Physical Changes a Woman May Experience

In the third and final trimester you will detect more physical changes, including:

Swelling of the ankles, fingers, and face. (If you detect any sudden or farthermost swelling or if you lot gain a lot of weight actually speedily, call your doctor right abroad. This could exist a sign of a serious condition chosen preeclampsia.)
Hemorrhoids
Tender breasts, which may leak a watery pre-milk called colostrum
Your belly push may protrude
The baby "dropping," or moving lower in your abdomen
Contractions, which can exist a sign of real or false labor
Other symptoms you may notice in the third trimester include shortness of breath, heartburn, and difficulty sleeping

A doctor examines a pregnant woman's belly.

Third Trimester: Changes as the Due Date Approaches

Other changes are happening in your body during the third trimester that you lot can't see. Every bit your due engagement approaches, your cervix becomes thinner and softer in a process called effacement that helps the cervix open up during childbirth. Your medico will monitor the progress of your pregnancy with regular exams, particularly every bit you near your due date.

The human fetus at 8 months, almost full term.

Third Trimester: The Baby at 32 Weeks

At 32 weeks in the 3rd trimester, your baby's evolution continues:

Your babe'due south basic are soft only fully formed.
Movements and boot increase.
The eyes can open and close.
Lungs are non fully formed, simply practise "breathing" movements occur.
Your baby's trunk begins to store vital minerals, such equally iron and calcium.
Lanugo (fine hair) begins to fall off.
Your baby is gaining about ½ pound a calendar week, weighs about 4 to 4½ pounds, and is about fifteen to 17 inches long.

Human fetus in utero at approximately 36 weeks.

Third Trimester: The Baby at 36 Weeks

At 36 weeks, as your due date approaches, your baby continues development:

The protective waxy coating (vernix) thickens.
Body fat increases.
Your baby is getting bigger and has less space to move around. Movements are less forceful, but you will however experience them.
Your baby is most sixteen to 19 inches long and weighs about 6 to 6½ pounds.

A mom looks at her newborn child.

Tertiary Trimester: The infant at 37 to 40 Weeks

Finally, from 37 to 40 weeks the final stages of your babe'south development occur:

By the end of 37 weeks, your baby is considered full term.
Your baby's organs are capable of functioning on their own.
As you near your due date, your baby may turn into a head-down position for birth.
Average birth weight is betwixt six pounds 2 ounces to 9 pounds 2 ounces and boilerplate length is 19 to 21 inches long. Most full-term babies fall within these ranges, simply healthy babies come in many unlike weights and sizes.

Sources:

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REFERENCES:

Centers for Illness Control and Prevention (CDC): "Pregnancy."
Womenshealth.gov: Centers for Illness Command and Prevention (CDC): "Stages of Pregnancy."

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Source: https://www.onhealth.com/content/1/pregnancy_stages_trimesters