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 process of prenatal development occurs in three main stages. 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 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 fetal period?
Defining the Fetal Stage A fetus is a prenatal human being between the embryonic stage and birth. The fetal stage extends from the beginning of the ninth week after fertilization to about 38 weeks after fertilization, which is the average time of birth. The fetal stage lasts a total of approximately 30 weeks.
How long is the embryo 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 first and longest stage of labor?
During the 1st stage of labour, contractions make your cervix gradually open (dilate). This is usually the longest stage of labour. At the start of labour, your cervix starts to soften so it can open. This is called the latent phase and you may feel irregular contractions.
What are the three prenatal stages?
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).
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 long does the fetal stage last?
A fetus is a prenatal human being between the embryonic stage and birth. The fetal stage extends from the beginning of the ninth week after fertilization to about 38 weeks after fertilization, which is the average time of birth. The fetal stage lasts a total of approximately 30 weeks.
What is prenatal development?
prenatal development, also called antenatal development, in humans, the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth (or parturition). Learn about human embryonic and fetal development from fertilization to birth.
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.
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.
Which is the longest stage of labor quizlet?
The transition phase is the longest phase of stage 1 and contractions are very intense and long in duration.
What is the longest labor time?
75 days After 75 days – and what is believed to be the longest labour ever recorded – Joanna gave birth to a healthy girl, Iga, and boy, Ignacy. The two babies were delivered by caesarean at a neo-natal clinic in Wroclaw, Poland. Each weighed just under 4lb.
How many weeks is the prenatal period?
The unborn baby spends around 38 weeks in the womb, but the average length of pregnancy (gestation) is counted as 40 weeks. This is because pregnancy is counted from the first day of the woman's last period, not the date of conception, which generally occurs two weeks later.
How long is prenatal development?
about 40 weeks 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.
What are the 3 periods of prenatal development?
From beginning as a one-cell structure to your birth, your prenatal development occurred in an orderly and delicate sequence. There are three stages of prenatal development: germinal, embryonic, and fetal.
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.
How long is the zygote stage?
about four days The zygote phase is brief, lasting only about four days. Around the fifth day, the mass of cells becomes known as a blastocyst.
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.
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.
Which stage of labor tends to last the longest during a normal delivery?
The first stage of labor is the longest stage. For first-time moms, it can last from 12 to 19 hours . It may be shorter (about 14 hours) for moms who've already had children. It's when contractions become strong and regular enough to cause your cervix to dilate (open) and thin out (efface).
What are the 4 stages of labor?
Labor happens in four stages:
- First stage: Dilation of the cervix (mouth of the uterus)
- Second stage: Delivery of the baby.
- Third stage: Afterbirth where you push out the placenta.
- Fourth stage: Recovery.
How long is a long labor?
Prolonged labor, also known as failure to progress, occurs when labor lasts for approximately 20 hours or more if you are a first-time mother, and 14 hours or more if you have previously given birth. A prolonged latent phase happens during the first stage of labor.
What is prenatal stage of development?
prenatal development, also called antenatal development, in humans, the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth (or parturition).
What is pre natal period?
The prenatal period is the period of time before birth. A woman's nutritional needs are high during this time. Because a woman may not know that she is pregnant, she may be poorly nourished. She may also consume alcohol or caffeine in excess, which may affect the growing embryo or fetus.
What are the three prenatal periods?
Normal prenatal development lasts about 38 weeks and is divided into three stages: germinal, embryonic, and fetal.
What are the three periods of prenatal development?
From beginning as a one-cell structure to your birth, your prenatal development occurred in an orderly and delicate sequence. There are three stages of prenatal development: germinal, embryonic, and fetal.
How long is the fetal stage?
After the embryonic stage, the fetal stage begins and your baby is called a fetus. This stage runs from the 11th week until birth.
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.