What is the correct sequence of stages in the formation of a baby?
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 are the 4 stages of embryonic development?
- 1.1 Fertilization.
- 1.2 Cleavage.
- 1.3 Blastulation.
- 1.4 Implantation.
- 1.5 Embryonic disc.
What parts of a baby develop first?
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.
What are the 5 stages of conception?
The Journey from Egg to Embryo
- 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 is the correct order of development of the following?
Cleavage → Zygote → Fertilization → Morula → Blastula → Gastrula.
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 …
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 is the correct order of events in fertilization?
The stages of fertilization can be divided into four processes: 1) sperm preparation, 2) sperm-egg recognition and binding, 3) sperm-egg fusion and 4) fusion of sperm and egg pronuclei and activation of the zygote.
What are the 4 stages of embryonic development quizlet?
Fetal Development (Lecture 4)
- Two-cell stage.
What develops first a boy or girl?
Your baby’s gender is determined at the moment of conception – when the sperm contributed a Y chromosome, which creates a boy, or an X chromosome, which creates a girl. Boys’ and girls’ genitals develop along the same path with no outward sign of gender until about nine weeks.
What is the first stage in the first trimester?
First trimester: key stages
The first trimester begins on the first day of your last period and lasts until the end of week 12. This means that by the time you know for sure you’re pregnant, you might already be five or six weeks pregnant! A lot happens during these first three months.
What happens in the fetal stage?
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 are the 9 stages of pregnancy?
Pregnancy Development Stages
- First Trimester Health.
- First Trimester Tests.
- Second Trimester Health.
- Second Trimester Tests.
- Third Trimester Health.
- Third Trimester Tests.
What are the 3 trimesters of pregnancy?
A pregnancy is divided into trimesters: the first trimester is from week 1 to the end of week 12. the second trimester is from week 13 to the end of week 26. the third trimester is from week 27 to the end of the pregnancy.