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 prenatal stage of development lasts the longest quizlet?
One question on the midterm exam asked which period of prenatal development is the third and longest period, extending from the ninth week until birth. The correct answer would be: the fetal period.
Which period of prenatal development has the shortest duration?
The germinal stage of development is the first and shortest of the stages of the human lifespan. The main events in this stage of development are illustrated in Figure 23.2.
Which of the three birth stages lasts the longest?
The first stage of labor, also called early labor, is by far the longest. It begins at the onset of labor and continues until the cervix is fully dilated.
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 does the germinal stage last?
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.
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.
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.
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 part of labor?
The first stage The first stage is the longest part of labor and can last up to 20 hours. It begins when your cervix starts to open (dilate) and ends when it is completely open (fully dilated) at 10 centimeters.
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.
Which of the following is a major stage of prenatal development and spans the time from fertilization to implantation in the wall of the uterus?
The germinal period (about 14 days in length) lasts from conception to implantation of the zygote (fertilized egg) in the lining of the uterus. During this time, the organism begins cell division and growth.
What is the first stage of prenatal development How long does it last?
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.
Which stage of prenatal development is the most vulnerable and why?
As in the case of the germinal period, often the mother does not yet know that she is pregnant. It is during this stage that the major structures of the body are taking form making the embryonic period the time when the organism is most vulnerable to the greatest amount of damage if exposed to harmful substances.
What is the last major step of embryonic development?
Fetal Development. By the twelfth week of fertilization the embryo moves into the final stage of development called the fetal stage. By now, the fetus has formed all of the organs and structures necessary for a baby, but those organs still need to grow and develop.
What are the stages of prenatal development?
There are three stages of prenatal development: germinal, embryonic, and fetal.
What are the 3 stages 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.
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 is the last stage of labor?
The last part of active labor — often referred to as transition — can be particularly intense and painful. Contractions will come close together and can last 60 to 90 seconds. You'll experience pressure in your lower back and rectum. Tell your health care provider if you feel the urge to push.
Which stage of labor is typically the longest quizlet?
The transition phase is the longest phase of stage 1 and contractions are very intense and long in duration.
Which stage of labor is the shortest?
In the third stage of labor, the placenta is delivered. The placenta grows in your uterus and supplies your baby with food and oxygen through the umbilical cord. This stage is the shortest and usually doesn't take more than 20 minutes.
Which stage of labor is typically the longest?
During the 1st stage of labour, contractions make your cervix gradually open (dilate). This is usually the longest stage of labour.
How long does the zygote stage last?
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. Around the fifth day, the mass of cells becomes known as a blastocyst.
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.
Why are the first 3 months first trimester of a pregnancy the most important developmentally?
The first trimester is the most crucial to your baby's development. During this period, your baby's body structure and organ systems develop. Most miscarriages and birth defects occur during this period. Your body also undergoes major changes during the first trimester.
How long does the prenatal stage last?
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 is the duration of prenatal stage?
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.
Is the first stage of labor the longest?
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 is prolonged 2nd stage of labor?
Prolonged second stage of labour is usually defined as 2–3 hours for primiparous women and 1–2 hours for parous women, with the longer interval for women with epidural analgesia during labour.
What stage of labor is the longest?
The First Stage of Labor. The first stage is the longest part of labor and can last up to 20 hours. It begins when your cervix starts to open (dilate) and ends when it is completely open (fully dilated) at 10 centimeters.