Which prenatal development stage is the longest?
the fetal period The longest period of prenatal development is the fetal period which begins at the 9th week after conception and lasts until birth.
Which is the longest period in prenatal development quizlet?
In order, the three main periods of prenatal growth are: germinal, embryonic, fetal. The longest period of prenatal development is the embryonic period.
What is the third and longest stage of prenatal development?
The Embryonic Period (Weeks 3-8) It lasts from the third through the eighth week after conception. Upon implantation, this multi-cellular organism is called an embryo. Now blood vessels grow, forming the placenta.
What are the periods of prenatal development?
There are three stages of prenatal development: germinal, embryonic, and fetal.
Which of the three stages is the longest quizlet?
1. The first stage is the longest of the three stages. Uterine contractions are 15 to 20 minutes apart at the beginning and last up to a minute.
How long is the embryonic stage?
After conception, your baby begins a period of dramatic change known as the embryonic stage. This stage runs from the 5th through the 10th week of pregnancy. During this stage, the baby is called an embryo.
What is the longest period of prenatal development extending from the ninth week until birth?
The fetal period lasts from the ninth week until birth. During this period, the organism is referred to as a fetus. During this stage, the major structures are continuing to develop. By the 12th week, the fetus has all its body parts including external genitalia.
How long is the germinal period?
The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.
Which stage of prenatal development is the shortest?
The germinal stage of development The germinal stage of development is the first and shortest of the stages of the human lifespan.
What are the three stages of prenatal development in order?
Normal prenatal development lasts about 38 weeks and is divided into three stages: germinal, embryonic, and fetal.
What is the duration of prenatal stage in days?
The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.
What are three periods of prenatal?
Normal prenatal development lasts about 38 weeks and is divided into three stages: germinal, embryonic, and fetal. During these three stages of gestation, the original single-celled zygote develops into an embryo and then fetus (1, 2).
Which of the three stages is longest?
- The first stage is the longest of the three stages. …
- The second birth stage begins when the baby's head starts to move through the cervix and the birth canal.
- Afterbirth is the third stage, at which time the pla- centa, umbilical cord, and other membranes are detached and expelled.
How long is a typical prenatal period in humans quizlet?
The prenatal period for an average human female is 280 days from the start of her last menstrual period.
When does the prenatal period begin?
Prenatal development starts at conception and ends with the birth of your baby. It takes about 40 weeks or nine months to create a new life, and your pregnancy is broken into three, 12-week trimesters. Each trimester brings about new changes and developments.
How long does the embryonic stage last?
After conception, your baby begins a period of dramatic change known as the embryonic stage. This stage runs from the 5th through the 10th week of pregnancy. During this stage, the baby is called an embryo.
How many weeks is the zygote stage?
Zygotes divide through a process known as mitosis, in which each cell doubles (one cell becomes two, two becomes four, and so on). This two-week stage is known as the germinal period of development and covers the time of fertilization (also called conception) to the implantation of the blastocyst in the uterus.
Which stage of prenatal development is the shortest quizlet?
Terms in this set (3)
- germinal stage. the first-and shortest-stage of the prenatal period, which takes place during the first 2 weeks following conception.
- embryonic stage. the period from 2-8 weeks following fertilization during which significant growth occurs in the major organs and body systems.
- fetal stage.
How long is embryonic stage?
After conception, your baby begins a period of dramatic change known as the embryonic stage. This stage runs from the 5th through the 10th week of pregnancy. During this stage, the baby is called an embryo.
What are the three periods of prenatal development in order?
Normal prenatal development lasts about 38 weeks and is divided into three stages: germinal, embryonic, and fetal.
What is the shortest stage of prenatal development?
The germinal stage of development is the first and shortest of the stages of the human lifespan.
What is the prenatal period of development quizlet?
Prenatal development proceeds through the germinal (first 2 weeks), embryonic (2 weeks to 2 months), and fetal stages (2 months to birth) as the zygote is differentiated into a human organism.
How long is the perinatal period?
What is the perinatal period? Per the AAPD, the perinatal period begins at the 20th -28th week of gestation at the 20th to 28th week of gestation and ends 1 to 4 weeks after delivery. It is characterized by complex physiological changes that may adversely affect oral health.
How long does the zygote period last?
The zygote begins as a single cell but divides rapidly in the days following fertilization. The zygote's single cell contains all of the 46 necessary chromosomes, getting 23 from the sperm and 23 from the egg. The zygote phase is brief, lasting only about four days.
When does the period of the zygote end?
The egg and sperm join in the days following ovulation after vaginal sex or medically assisted fertilization. The zygote phase is short, lasting only around four days, after which its cells rapidly divide to become a blastocyst.
Which prenatal period is the shortest?
Terms in this set (3)
- germinal stage. the first-and shortest-stage of the prenatal period, which takes place during the first 2 weeks following conception.
- embryonic stage. the period from 2-8 weeks following fertilization during which significant growth occurs in the major organs and body systems.
- fetal stage.
How long is the embryonic period?
After conception, your baby begins a period of dramatic change known as the embryonic stage. This stage runs from the 5th through the 10th week of pregnancy. During this stage, the baby is called an embryo. There are numerous changes that occur during the embryonic stage.
Which of the following is the shortest of all developmental periods?
Infancy Is the Shortest of All Developmental Periods Although most infants complete this adjustment in two weeks or slightly less, those whose birth has been difficult or premature require more time.
What age is considered perinatal?
The two measures result in somewhat different estimates of the numbers and rates of total fetal (20 weeks or more), early fetal (less than 28 weeks), late fetal (28 weeks or more), and perinatal (infant deaths under 7 days and fetal deaths at 28 weeks or more) deaths (5).
What is Intranatal period?
Background: Intra natal care means care taken during delivery. This consists of taking care of not only the mother but also the newborn at the time of child-birth. Appropriate delivery care is crucial for both maternal and perinatal health.