Stages Of Prenatal Development And Environmental Influence & Principles Of Growth And Development Flashcards
Normal full term birth spans
37-42 weeks and 2 days
Pre term birth spans
Less than 37 weeks
Post term birth spans
Those that end beyond 42 weeks and 3 days
What are the 3 periods of stages of prenatal development
Zygote
Embryo
Fetus
In what week does the baby started to develop a heart beat
5 weeks
In what week does the baby started to develop the ears
8 weeks
The zygote has multiples into a ball of more than 50 cells
Blastocysts
Develops into structure that support and protect the baby before birth
Trophoblast
Between 7 and 9 days after conception blastocyst begins the process of attaching itself to the uterine wall
Implantation
It helps keep the temperature of the prenatal development constant
Amniotic fluid
Lasts from implantation through 8 week of pregnancy
Period of Embryo
Embryonic disc forms three layers:
Ectoderm
Mesoderm
Endoderm
During what month does the eyes, ear,nose, and arms begin to form?
1 month
At what age does the embryo begins to look recognizably human?
6 weeks of age
What is the purpose of the placenta??
Transmit nutrients from mother
How to compute the last menstrual period?
Minus 3 months, add 7 days, add 1 year
What week does the brain develop during conception?
3 1/2 weeks
In what age does the fetus can hiccup and react to very loud noice
9 weeks of age
A white covering of the fetus that protects the baby from the extreme heat
Lanugo
The lanugo is coated with thick whitish cream called?
Vernix
What is the point at which the baby can survive, sometimes between 22and 26 weeks?
Age of viability
A thing that is placed in the abdomen to hear the sound Of the baby
Fetal doppler
In what week of age does the head and blood vessels form and brain begins to develop?
3 weeks
Heart begins to beat and pump blood , arm buds and leg buds appear, eyes, ears, nose,and mouth form, nerves begin to develop, etc.
4 weeks
Hands and feet develop with webbed fingers and toes, undifferentiated sex organs appear, head is half length of the entire body, etc.
5-8 weeks
All major organ systems are formed, fingers and toes are fully formed, sex of fetus can clearly distinguished, etc.
9-16 weeks
Mother detects fetal movement, many reflexes are present, etc.
13-16weeks
Hair develops on head, lanugo covers the body, heart beat can be heard when listener presses head against mother’s abdomen
17-20 weeks
Eyes open and shut, light and sounds can be perceives, fetus alternates between periods ofsleep and wakefulness
21-24 weeks
Organ system continue to mature, fetus turns head down in uterus chances of survival are good, etc.
25-28 weeks
Organs system function well,
29 - 38 weeks
Refers to any environmental agents that causes damage during the prenatal period
Teratogens
Stress hormones
Cortisol
What stage does the developing organism is most vulnerable?
Embryonic stage
Affects mainly the fetus heart, eyes, and brain
Rubella/measles
Infants under 12 months of age stop breathing and die without apparent cause
Sudden infant death syndrome (SIDS)
A number of times when the women gets pregnant
Parity
A fundamental, primary or general law or truth from which others are derived
Principles
Net increase in the size, or mass of the tissue. It is largely attributed to multiplication of cells and increase in the intracellular substance
Growth
Refers to progressive increase in skill and capacity, though its rate varies from one child to another
Development
Growth and development is a continuous process from conception to death
Continuity
Follows a pattern of development peculiar to it.
Sequentiality
The tempo of development is not even. Individuals differ in the rate of growth and development
Differentiality
Describes the direction of growth and development.
Development proceeds from head downward
What is the directional sequence of development during both prenatal and postnatal stages
From head to toe or from central axis to the extremities of the body
