Stages of development: During the fetal stage, the brain develops and the body adds size and weight, until the fetus reaches full-term development. Throughout the fetal stage the brain continues to grow and develop, nearly doubling in size from weeks 16 to 28.
What physical changes occur in the fetal stage?
Fetal developments that occur between weeks 16 and 26 after fertilization include development of the senses of touch and hearing, initial formation of alveoli in the lungs, beginning of ossification of the bones, and considerable muscle development.
What is the fetal stage of development?
After the embryonic stage, the fetal stage begins and your baby is called a fetus. This stage runs from the 11th week until birth. Your baby will grow longer and gain weight quicker. His or her organs and body parts will continue to develop.
What are 3 facts about the fetal stage?
- Nipples and hair follicles form.
- Arms grow and elbows develop.
- Baby’s toes can be seen.
- All baby’s essential organs have begun to grow.
What is the first thing to develop in a fetus?
Just four weeks after conception, the neural tube along your baby’s back is closing. The baby’s brain and spinal cord will develop from the neural tube. The heart and other organs also are starting to form. Structures necessary to the formation of the eyes and ears develop.
Which of the following happens during the fetal period?
The Fetal Period
During this stage, the major structures are continuing to develop. By the 12th week, the fetus has all its body parts including external genitalia. In the following weeks, the fetus will develop hair, nails, teeth and the excretory and digestive systems will continue to develop.
What are the developmental stages?
There are three broad stages of development: early childhood, middle childhood, and adolescence. They are defined by the primary tasks of development in each stage.
What are the 4 stages of embryonic development?
- 1.1 Fertilization.
- 1.2 Cleavage.
- 1.3 Blastulation.
- 1.4 Implantation.
- 1.5 Embryonic disc.
What are the stages of postnatal development?
Postnatal growth consists of at least three distinct phases, infancy, childhood, and puberty (11), which are influenced by different growth factors.
What are the 5 stages of conception?
- Conception: From Egg to Embryo. …
- Ovulation. …
- Moving Into the Fallopian Tube. …
- The Sperm’s Long Journey. …
- Fertilization: Sperm Penetrates Egg. …
- The Cells Start to Divide. …
- Implantation. …
- Pregnancy Hormones.
What are the 3 stages of prenatal development?
This union marks the beginning of the prenatal period, which in humans encompasses three distinct stages: (1) the pre-embryonic stage, the first two weeks of development, which is a period of cell division and initial differentiation (cell maturation), (2) the embryonic period, or period of organogenesis, which lasts …
Which happens during the fetal period quizlet?
During the fetal period, the rate of growth slows as the infant prepares for birth. the trophoblast, which gives rise to the embryonic part of the placenta.
When does fetal development begin?
Most organs begin to form about 3 weeks after fertilization, which equals 5 weeks of pregnancy (because doctors date pregnancy from the first day of the woman’s last menstrual period, which is typically 2 weeks before fertilization). At this time, the embryo elongates, first suggesting a human shape.
What is the correct order of development during the embryonic period quizlet?
(1) Answers should include three distinct events in order: (1) the zygote rapidly divides and enters the uterus about 3 days later; (2) the blastocyst forms; and (3) the blastocyst develops projections, and roughly 14 days after fertilization, fully implants into the uterine wall.
What are development tasks?
A developmental task is a task that arises at or about a certain period in life, unsuccessful achievement of which leads to inability to perform tasks associated with the next period or stage in life.
What is the most important stage of development?
Parent Tip. Recent brain research indicates that birth to age three are the most important years in a child’s development.
What are the 7 stages of development?
There are seven stages a human moves through during his or her life span. These stages include infancy, early childhood, middle childhood, adolescence, early adulthood, middle adulthood and old age.
What happens in the blastocyst stage?
It is at the blastocyst stage of development (five days after fertilisation) that an embryo would normally move out of the fallopian tube and into the uterus. Once in the uterus, the blastocyst starts to attach to the uterine lining in a process known as implantation.
What are the 4 stages of embryonic development quizlet?
- Cleavage. 1st stage. …
- blastulation. 2nd stage. …
- gastrulation. 3rd stage. …
- neurulation. 4th stage. …
- neural tube. Fetal tissue that develops into the central nervous system.
- morula. When the embryo is 16 to 32 cells. …
- hCG. HUMAN CHORIONIC GONADOTROPIN–hormone produced by placenta. …
What are the 6 stages of embryonic development?
- F. Fertilization- 12-24 hours after implantation.
- C. Cleavage- a series of mitotic cell division convert zygote into multicellular embryo.
- M. Morula- cells become a solid ball.
- B. Blastula- fluid filled cluster of cells, inner cell mast develops.
- G. Gastruela- 3 primary germ layers form.
How many stages are there in human development?
 There are five significant phases in human growth and development, Infancy (neonate and up to one year age) Toddler ( one to five years of age) Childhood (three to eleven years old) – early childhood is from three to eight years old, and middle childhood is from nine to eleven years old.
What factors affect fetal growth?
Genetic, nutritional, environmental, uteroplacental, and fetal factors have been suggested to influence fetal growth. Uteroplacental and umbilical blood flow and transplacental glucose and fetal insulin are major determinants of fetal growth.
What is prenatal and postnatal development?
Prenatal growth was defined as size at birth. Infancy was partitioned into early infancy growth (from birth to 4 months) and late infancy growth (from 4 months to 1 year). Late postnatal growth was defined as growth from 1 to 9 years.
What are the 9 stages of pregnancy?
- First Trimester Health.
- First Trimester Tests.
- Second Trimester Health.
- Second Trimester Tests.
- Third Trimester Health.
- Third Trimester Tests.
Which development occurs in the seventh month of fetal development?
Month 7 (weeks 25 through 28)
The fetus continues to mature and develop reserves of body fat. At this point, hearing is fully developed. The fetus changes position frequently and responds to stimuli, including sound, pain and light. The amniotic fluid begins to diminish.
How long is 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.
When does the fetal phase begin quizlet?
Week 9 is generally regarded as the start of the fetal period. The fetal period is primarily for growth and maturation of tissues and organs in the fetus.
What is the correct order of the development?
Cleavage → Zygote → Fertilization → Morula → Blastula → Gastrula.
Which of the following is the correct order of development during gestation?
There are three stages of prenatal development: germinal, embryonic, and fetal.
What happens during the third trimester?
During the third trimester, the fetus continues to grow in size and weight. The lungs are still maturing. The fetus starts to position itself head-down. By the end of the third trimester, the fetus is about 19 to 21 inches long and weighs about 6 to 9 pounds.
What major changes occur during the fetal stage of development quizlet?
What is the time frame for the fetus and what are the major changes that occur during fetal development? The fetal stage begins at the end of the 8th week of prenatal development and lasts until birth. Growth is rapid, and body proportions change considerably.
What organ develops gradually over the fetal stage?
Proper development of the placenta is critical to normal fetal development and plays an active role in programming the in utero fetal experience, which influences diseases that may appear in adulthood. The function of the placenta develops gradually in a series of closely organized developmental stages of pregnancy.