Full Answer
What is the difference between conceptional age and estimated gestational age?
Because the exact time of conception is difficult to determine, conceptional age is assumed to be 2 weeks less than gestational age. The estimated gestational age as referenced from the actual time of conception. It is usually considered to be at least 14 days after the first day of the last menstrual period.
What is the meaning of gestational age?
Gestational age refers to how far along the pregnancy is and is generally expressed as a combination of weeks and days. Gestational age helps to estimate a possible due date, inform obstetrical care and testing, and evaluate the baby's health at birth.
How is gestational age calculated for assisted reproductive technology?
If pregnancy was achieved using assisted reproductive technology, gestational age is calculated by adding 2 weeks to the conceptional age. Chronological age (days, weeks, months, or years): time elapsed from birth. Postmenstrual age (weeks): gestational age plus chronological age.
Why is the term conceptual age used?
The term Conceptual Age is used because conceptual thinking is expected to be key. One definition of conceptual thinking is, "the ability to identify patterns or connections between situations that are not obviously related, and to identify key or underlying issues in complex situations.
What is the conceptual age?
Why is conceptual age important?
What skills are needed in the conceptual age?
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What is the difference between gestational age and conceptional age?
Terminology. Gestational age (GA) refers to the length of pregnancy after the first day of the last menstrual period (LMP) and is usually expressed in weeks and days. This is also known as menstrual age. Conceptional age (CA) is the true fetal age and refers to the length of pregnancy from the time of conception.
What is normal gestational age?
A normal pregnancy can range from 38 to 42 weeks. Infants born before 37 weeks are considered premature. Infants born after 42 weeks are considered postmature.
What is actual ultrasound age?
AUA stands for actual ultrasound age. This refers to the age your baby is from conception, based on the baby's measurements. Confusing? Remember, the gestational age is calculated from the first day of your last period and is how many weeks pregnant you are.
How is gestational age determined?
Determining Gestational Age Healthcare providers can determine weeks of gestation by looking at the mother's menstrual cycle and with the use of ultrasounds. Gestational age is calculated from the first day of the pregnant person's last menstrual period (LMP) to the present day.
Is gestational age accurate?
Between 20 and 30 weeks of gestation, the accuracy of even the best ultrasound estimates degrades steadily from 9 to 18 days. In the absence of alternatives, WHO recommends ultrasound measurement of fetal size before 24 weeks of gestation to estimate gestational age.
What is large gestational age?
Large for gestational age (LGA) refers to a fetus or infant who is larger than expected for their age and gender. It can also include infants with a birth weight above the 90th percentile. The LGA measurement is based on the estimated gestational age of the fetus or infant.
Which date is correct LMP or ultrasound?
LMP versus early ultrasound If the ultrasound date is within seven days of your LMP date, we would stick with your LMP date. Ultrasounds done later in the pregnancy are less accurate for dating, so if your due date is set in the first trimester, it shouldn't be changed.
Is ultrasound due date accurate?
An ultrasound is actually the most accurate way to date a pregnancy because all fetuses grow at a consistent rate during the first trimester and early second. In other words, if your baby measures 9 weeks 2 days when you have your ultrasound, that's how far along you are, no matter when your last period was.
Is 7 weeks too early for a dating scan?
When is a dating scan usually done? A dating scan is done between 8 and 14 weeks of pregnancy (and usually between 8 and 12 weeks), when most babies of the same gestational age are about the same size.
Can gestational age be off by 2 weeks?
After the infant is born, there are a variety of characteristics that can be used to estimate the gestational age. It is possible for gestational age to be inaccurate by up to 2 weeks, even with an accurate LMP date confirmed by other tests.
What is the meaning of gestational?
ges·ta·tion je-ˈstā-shən. : the carrying of young in the uterus (see uterus sense 1) : pregnancy. : conception (see conception sense 3) and development especially in the mind. gestational.
How do you calculate gestational age manually?
First, determine the first day of your last menstrual period. Next, count back 3 calendar months from that date. Lastly, add 1 year and 7 days to that date.
Is 37 weeks full term for a baby?
At 37 weeks, your pregnancy is considered full-term. The average baby weighs around 3-4kg by now.
What percentile is appropriate for gestational age?
Appropriate-for-Gestational-Age (AGA): A birth is considered to be appropriate for gestational age if the birth weight is between the 10th and 90th percentiles for the infant's gestational age and sex.
Can gestational age be off by 2 weeks?
After the infant is born, there are a variety of characteristics that can be used to estimate the gestational age. It is possible for gestational age to be inaccurate by up to 2 weeks, even with an accurate LMP date confirmed by other tests.
What causes large gestational age?
A newborn who weighs more than 90% of newborns of the same gestational age at birth (above the 90th percentile) is considered large for gestational age. Newborns may be large because the parents are large or because the mother has diabetes or is obese.
What is the conceptual age?
The business world uses the term The Conceptual Age or The Creative Age or The Age of Imagination. It is the next great age of the Western world. The course of Western civilization can be divided into the Agricultural Age, the Industrial Age and the Information Age. This course is specific to the Western world, ...
Why is conceptual age important?
The term Conceptual Age is used because conceptual thinking is expected to be key. One definition of conceptual thinking is, "the ability to identify patterns or connections between situations that are not obviously related, and to identify key or underlying issues in complex situations. It includes using creative, ...
What skills are needed in the conceptual age?
In the Conceptual Age, right-brain skills will be key. Given the velocity of change and the complexity that results from this, we need to go beyond just knowledge or expertise. The best employees of the future will excel at creative problem solving and different ways of thinking -- synthesizing seemingly diverse things together for better solutions, using metaphors to explain new ideas for which no context yet might exist.
Why is it so hard to determine the gestational age of a baby?
In some cases, it is difficult to determine the gestational age because the baby is unusually large or small. Also, in some cases, the size of the uterus in early pregna ncy or the height of the uterus in later pregnancy does not match the first day of the last menstrual period.
When can you measure a baby?
The baby can be measured as early as 5 or 6 weeks after the mother’s last menstrual period. Measuring the baby using ultrasound is most accurate in early pregnancy. It becomes less accurate later in pregnancy. The best time to estimate gestational age using ultrasound is between the 8th and 18th weeks of pregnancy.
When to use ultrasound to determine gestational age?
The best time to estimate gestational age using ultrasound is between the 8th and 18th weeks of pregnancy. The most accurate way to determine gestational age is using the first day of the woman’s last menstrual period and confirming this gestational age with the measurement from an ultrasound exam.
How many weeks is a baby due?
Based on the last menstrual period, the estimated due date is 40 weeks from the first day of the period. This is just an estimate since only about 5% of babies are born on their estimated due date.
Why do women not know when they are pregnant?
Most women do not know the exact date of conception because it can be challenging to know exactly when ovulation occurs. Thus, their conception date is merely an estimate based on the first day of their last period.
When does fetal age start?
While gestational age starts with the date of the LMP, embryonic age (and later fetal age) starts at the time of conception, when the sperm fertilizes the egg. Fetal age is two weeks behind gestational age and describes the actual age of the fetus.
What is the significance of gestational age?
FAQs. Gestation is a term that describes the time between conception and birth, during which a baby grows and develops in the pregnant parent's uterus. Gestational age refers to how far along the pregnancy is and is generally expressed as a combination of weeks and days.
What is the difference between gestational age and fetus age?
Gestational age is the time beginning with the pregnant person's last menstrual period (LMP) to the present (and as a result, includes the two weeks before conception occurred). It refers to how far along the pregnancy has progressed. Gestational age is the number most people use when describing how many weeks pregnant they are. 3 Fetal age, on the other hand, starts at conception and only describes the age of the developing fetus.
How many days are pregnant during a fetal ultrasound?
Calendar calculations based on the last menstrual period assume the pregnant person has a regular 28-day cycle . Because that is often not the case, fetal ultrasounds help to provide more information to inform gestational age. In fact, first-trimester ultrasounds of the embryo or fetus (up to an including 13 6/7 weeks of gestation) ...
Why is gestational age important?
Gestational age is an important tool to help your doctor or midwife provide the best prenatal care throughout your pregnancy and to evaluate your baby's growth. It also allows you to follow along week by week as your baby develops.
What is the gestational age used for?
In cases where assisted reproductive technology (ART) is used to conceive, the ART-derived gestational age is used to calculate the estimated date of delivery (EDD) or due date. For example, with in-vitro fertilization, doctors would use the age of the embryo and the date of the transfer along with ultrasounds to determine how far along the pregnancy is.
How to determine weeks of gestation?
Healthcare providers can determine weeks of gestation by looking at the mother's menstrual cycle and with the use of ultrasounds. Gestational age is calculated from the first day of the pregnant person's last menstrual period (LMP) to the present day. (Technically, gestational age includes the two weeks prior to conception, ...
When does a baby become an infant?
After the first month of life, a baby is no longer a neonate, and becomes an infant. With this there are further expected changes that slowly lead into the tracing of an adult.
What is a neonate EEG?
Newborn babies less than four weeks of age are termed neonates, and their EEGs reflect the rapid development of their brain in that time. The normal neonatal EEG exhibits many characteristics that would be grossly abnormal in an adult, including diffuse slowing, discontinuity, asynchrony, and minimal reactivity, but all of these unique characteristics should evolve, in normalized increments of time, into the familiar tracings of infants, children and adults (it seems that babies like to keep both their parents and neurophysiologists on their toes). Below is a summary of the changes across the first weeks of life for a neonate that will be further discussed in the sections below:
How is neonatal EEG different from adult EEG?
As stated above, neonatal EEGs are starkly different than adults, showing diffuse slowing, discontinuity, asynchrony, and minimal reactivity. Sleep is also different in a neonate, being broken down into quiet and active sleep as opposed to the four stages in adults. These differences, marked as they are, progress into a more classic childhood and then adult EEG, and knowing the timeframe of such changes is critical because what is normal one week for a neonate may be abnormal by the next week.
What is the most striking component of a neonatal background?
The most striking component of a neonatal background is discontinuity, or periods of essentially flat activity in between bursts of activity.
When do babies start reacting to stimuli?
Up to 28 weeks PMA a normal tracing may show no reactivity, but starting at 30 weeks you should start to see reactivity to external stimuli; most babies are fully reactive starting between 32 and 40 weeks PMA.
Is it important to recognize the state of a baby?
Between awake and quiet sleep, there are often periods of transition that can be unclear, but as development continues the states should become more clearly defined; such periods of indeterminate sleep may be seen more often in neonates with brain injury, such as hypoxic ischemic injury (HIE). No matter what, though, being able to recognize the state of a baby is just as important as it is for adults, albeit often less clear cut. Take a minute to review the expected timeline for state changes, remembering that prior to 28-30 weeks there really aren't any different states:
How to calculate gestational age?
If pregnancy was achieved using assisted reproductive technology, gestational age is calculated by adding 2 weeks to the conceptional age.
What is chronological age?
Chronological age (days, weeks, months, or years): time elapsed from birth.
Does everyone understand developmental equations?
But not everyone knows. Not everyone understands the developmental portion of this equation unless we bring it to light.
What is the conceptual age?
The business world uses the term The Conceptual Age or The Creative Age or The Age of Imagination. It is the next great age of the Western world. The course of Western civilization can be divided into the Agricultural Age, the Industrial Age and the Information Age. This course is specific to the Western world, ...
Why is conceptual age important?
The term Conceptual Age is used because conceptual thinking is expected to be key. One definition of conceptual thinking is, "the ability to identify patterns or connections between situations that are not obviously related, and to identify key or underlying issues in complex situations. It includes using creative, ...
What skills are needed in the conceptual age?
In the Conceptual Age, right-brain skills will be key. Given the velocity of change and the complexity that results from this, we need to go beyond just knowledge or expertise. The best employees of the future will excel at creative problem solving and different ways of thinking -- synthesizing seemingly diverse things together for better solutions, using metaphors to explain new ideas for which no context yet might exist.
