What Stage of Pregnancy Is the Baby About 1/2 Pound in Weight

Overview

How long does information technology take for a infant to be born? A typical pregnancy lasts 40 weeks from the first day of your terminal menstrual period (LMP) to the nascency of the baby. Information technology is divided into three stages, called trimesters: outset trimester, second trimester, and 3rd trimester. The fetus undergoes many changes throughout maturation.

How Soon Can You lot Tell If You Are Pregnant?

A missed catamenia is often the starting time sign that you may be meaning, but how do you know for sure? Many women employ home pregnancy tests to tell if they are significant; even so, these tests are more than likely to be accurate when used at to the lowest degree i week later a woman's last menstruation. If y'all have the test less than 7 days before your last menstrual period, information technology may give you a imitation result. If the test is positive, information technology is more probable that y'all actually are meaning. All the same, if the test is negative, there is an increased take a chance that the examination is wrong. Your doctor can practise a blood examination to find pregnancy sooner than a home pregnancy examination can.

Pregnancy Weight Gain

The amount of weight a adult female should gain during pregnancy depends on her body mass index (BMI) prior to becoming significant. Women who are a normal weight should proceeds betwixt 25 and 35 pounds. Women who are underweight prior to pregnancy should gain more. 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 day during the first trimester, two,200 calories per mean solar day during the second trimester, and 2,400 calories during the third trimester.

Pregnancy Weight Proceeds Distribution

Women gain weight all over their bodies while they are pregnant. Fetal weight accounts for nearly vii 1/2 pounds past the stop of pregnancy. The placenta, which nourishes the infant, weighs about one i/2 pounds. The uterus weighs 2 pounds. A adult female gains about iv pounds due to increased blood volume and an additional 4 pounds due to increased fluid in the body. A adult female's breasts gain 2 pounds during pregnancy. Amniotic fluid that surrounds the baby weighs 2 pounds. A woman gains about 7 pounds due to excess storage of protein, fat, and other nutrients. The combined weight from all these sources is about 30 pounds.

Pregnancy Complications

Pregnant women may feel certain complications and symptoms as the fetus grows. Anemia, urinary tract infection, and mood changes may occur. An expectant mother may feel high blood force per unit area (preeclampsia), which increases the risk of preterm delivery and other potential dangers for the baby. Astringent forenoon sickness or hyperemesis gravidarum causes persistent nausea and airsickness, particularly during the showtime 12 pregnancy weeks. This may atomic number 82 to starting time trimester symptoms of weight loss and dehydration, requiring IV fluids and antinausea medication. Meaning women should be aware of the possibility of developing gestational diabetes. It causes symptoms like excessive thirst and hunger, frequent urination, and fatigue. Obesity and excessive weight gain are possible, especially as the pregnancy progresses. Women are supposed to proceeds weight during pregnancy, but excessive weight gain may exist associated with symptoms that put mother and baby at risk. Inquire your doc how much weight y'all should gain during your pregnancy.

The Iii Stages of Pregnancy
(1^st, two^nd, and iii^rd Trimester)

Conception to well-nigh the 12th week of pregnancy marks the first trimester. The 2nd trimester is weeks 13 to 27, and the third trimester starts nearly 28 weeks and lasts until nascence. This slide show will discuss what occurs to both the mother and babe during each trimester.

First Trimester

Start Trimester: Week 1 (formulation) – Week 12

First Trimester: Early on Changes in a Woman'due south Body

The early changes that signify pregnancy get present in the first trimester. A missed menses may be the offset sign that fertilization and implantation have occurred, ovulation has ceased, and yous are significant. Other changes will also occur.

First Trimester: Concrete and Emotional Changes a Woman May Experience

Hormonal changes will affect near every organ in the body. Some signs of early pregnancy in many women include symptoms like:

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

First Trimester: Changes in a Woman's Daily Routine

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

Offset Trimester: The Baby at 4 Weeks

At 4 weeks, your baby is developing:

• The nervous system (brain and spinal string) has begun to grade.
• The heart begins to grade.
• Arm and leg buds begin to develop.
• Your baby is now an embryo and ane/25 of an inch long.

First Trimester: The Baby at 8 Weeks

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

• All major organs take begun to class.
• The baby's heart begins to beat.
• The arms and legs grow longer.
• Fingers and toes accept begun to form.
• Sex organs begin to form.
• The face up begins to develop features.
• The umbilical string is clearly visible.
• At the end of eight weeks, your babe is a fetus, and is virtually 1 inch long, weighing less than ⅛ of an ounce.

First Trimester: The Baby at 12 Weeks

The end of the kickoff trimester is at most week 12, at this indicate in your baby'south development:

• The nerves and muscles begin to piece of work together. Your baby can make a fist.
• The external sexual activity organs show if your baby is a boy or girl.
• Eyelids close to protect the developing eyes. They will not open up again until week 28.
• Head growth has slowed, and your baby is almost 3 inches long, and weighs almost an ounce.

Second Trimester

Second trimester: Week xiii – Week 28

Second Trimester: Changes a Adult female May Experience

Once you enter the second trimester you may detect it easier than the offset. Your nausea (morning sickness) and fatigue may lessen or go away completely. However, you volition also notice more changes to your trunk. That "babe bump" will start to show as your belly expands with the growing baby. By the end of the second trimester y'all will even be able to feel your infant motility!

2nd Trimester: Physical and Emotional Changes in a Woman

Some changes you may detect in your trunk in the second trimester include:

• Back, abdomen, groin, or thigh aches and pains
• Stretch marks on your abdomen, breasts, thighs, or buttocks
• Darkening of the pare around your nipples
• A line on the skin running from omphalos to pubic hairline (linea nigra)
• Patches of darker peel, commonly 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 belly, palms, and soles of the anxiety. (Call your dr. if you have nausea, loss of appetite, airsickness, yellowing of skin, or fatigue combined with itching. These can be signs of a liver trouble.)
• Swelling of the ankles, fingers, and face. (If you notice any sudden or extreme swelling or if you gain a lot of weight quickly, call your physician immediately. This could be a sign of a serious condition called preeclampsia.)

Second Trimester: The Babe at 16 Weeks

As your trunk changes in the 2nd trimester, your baby continues to develop:

• The musculoskeletal organisation continues to course.
• Skin begins to grade and is nearly translucent.
• Meconium develops in your baby's intestinal tract. This will be your baby'southward first bowel move.
• Your baby begins sucking motions with the mouth (sucking reflex).
• Your infant is virtually 4 to v inches long and weighs almost 3 ounces.

Second Trimester: The Baby at 20 Weeks

At near twenty weeks in the second trimester, your baby continues to develop:

• Your babe is more than active. You might feel motion or kicking.
• Your baby is covered past fine, feathery pilus called lanugo and a waxy protective coating called vernix.
• Eyebrows, eyelashes, fingernails, and toenails have formed. Your baby tin can even scratch itself.
• Your babe tin hear and swallow.
• At present halfway through your pregnancy, your babe is almost 6 inches long and weighs most ix ounces.

2nd Trimester: The Babe at 24 Weeks

Past 24 weeks, even more than changes occur for your growing baby:

• The baby'due south bone marrow begins to brand claret cells.
• Taste buds form on your baby'due south tongue.
• Footprints and fingerprints have formed.
• Pilus begins to abound on your baby's caput.
• The lungs are formed, but do not nevertheless work.
• Your baby has a regular slumber cycle.
• If your baby is a boy, his testicles begin to descend into the scrotum. If your baby is a girl, her uterus and ovaries are in place, and a lifetime supply of eggs has formed in the ovaries.
• Your infant stores fat and weighs about one½ pounds, and is 12 inches long.

Third Trimester

Third Trimester: Week 29 – Week 40 (birth)

Tertiary Trimester: Changes a Woman May Feel

The third trimester is the final stage of pregnancy. Discomforts that started in the 2d trimester will probable go on, along with some new ones. Every bit the babe grows and puts more pressure on your internal organs, you lot may find you accept difficulty breathing and have to urinate more oft. This is normal and once you give nascency these problems should go away.

Third Trimester: Emotional and Physical Changes a Woman May Experience

In the tertiary and final trimester yous will find more physical changes, including:

• Swelling of the ankles, fingers, and face. (If you find any sudden or extreme swelling or if you proceeds a lot of weight really quickly, telephone call your doctor right away. This could be a sign of a serious condition called preeclampsia.)
• Hemorrhoids
• Tender breasts, which may leak a watery pre-milk called colostrum
• Your omphalos may protrude
• The baby "dropping," or moving lower in your abdomen
• Contractions, which can be a sign of real or false labor
• Other symptoms you may observe in the third trimester include shortness of breath, heartburn, and difficulty sleeping

Third Trimester: Changes equally the Due Appointment Approaches

Other changes are happening in your trunk during the third trimester that you can't encounter. As your due appointment approaches, your neck becomes thinner and softer in a process called effacement that helps the neck open up during childbirth. Your doc will monitor the progress of your pregnancy with regular exams, peculiarly as you about your due engagement.

Third Trimester: The Baby at 32 Weeks

At 32 weeks in the third trimester, your baby'due south evolution continues:

• Your infant'southward bones are soft but fully formed.
• Movements and kicking increase.
• The eyes can open and close.
• Lungs are not fully formed, merely practice "breathing" movements occur.
• Your babe'southward torso begins to shop vital minerals, such as fe and calcium.
• Lanugo (fine pilus) begins to fall off.
• Your baby is gaining well-nigh ½ pound a week, weighs about 4 to four½ pounds, and is about 15 to 17 inches long.

Third Trimester: The Baby at 36 Weeks

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

• The protective waxy blanket (vernix) thickens.
• Body fatty increases.
• Your baby is getting bigger and has less infinite to move around. Movements are less forceful, just you will still experience them.
• Your baby is about 16 to xix inches long and weighs about 6 to 6½ pounds.

Third Trimester: The babe at 37 to twoscore Weeks

Finally, from 37 to 40 weeks the last stages of your baby's development occur:

• Past the end of 37 weeks, your baby is considered total term.
• Your babe's organs are capable of functioning on their ain.
• Every bit you near your due date, your baby may turn into a head-downwards position for nativity.
• Average nativity weight is between 6 pounds ii ounces to nine pounds 2 ounces and boilerplate length is 19 to 21 inches long. About total-term babies fall inside these ranges, but healthy babies come up in many different weights and sizes.

Sources:

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REFERENCES:

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

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

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